Common use of Installation and Maintenance of Rooftop Equipment Clause in Contracts

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work), at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant Work. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents in accordance with Section 10.05(a). Landlord may withhold approval of the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building or interfere with Building operations or systems. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located at least twice annually and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interference.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Section 1.4 (relating to the Generator) and Section 8.3. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)8.3. Subject to the provisions of Section 1.4, Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building, and Landlord may condition its approval of Rooftop Equipment upon Tenant’s structural re-enforcement of the roof as reasonably deemed necessary or desirable by Landlord in order to accommodate the Rooftop Equipment. Tenant shall cooperate with Landlord as reasonably required to accommodate any base Building equipment or interfere Building systems or for the re-roofing of the Building during the Term and Tenant shall be responsible for any costs associated with Building operations working around, moving or systemstemporarily relocating Tenant’s Rooftop Equipment. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 18 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall use commercially reasonable efforts to obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms so long as Tenant has been provided a copy of the roof warrantysame. Tenant, at its sole cost and expense, shall cause a qualified employee or contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Area at least twice annually quarterly and as often as recommended by the manufacturer of any Rooftop Equipment and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Base Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Area and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide be (i) designed and installed in every a manner consistent with a first-class laboratory building and in compliance with Applicable Laws, including F.C.C. or other lease of space in the Building that permits rooftop accessregulations, and (ii) shall be screened in every license or other agreement regarding use a manner consistent with a first-class laboratory building so as not to be visible from the ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProperty.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense using contractors designated by Landlord (except as otherwise provided with respect unless Landlord consents in writing to the Finish Work), Tenant’s contractor which consent shall be at Landlord’s sole discretion) at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkAlterations and in compliance with all Laws. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents Alterations in accordance with Section 10.05(a)9.03. Landlord may withhold approval of the installation or operation of the Rooftop Equipment if to the same reasonably extent such Rooftop Equipment or its installation or operation would be expected to damage adversely impact the structural integrity Building’s structure or systems, affect future marketability of the Premises, Building or Complex or would interfere with the use and occupancy of other tenants and occupants of the Building or interfere with Building operations or systemsand/or Complex. Tenant shall shall, at Tenant’s sole cost and expense, engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 Section 28 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located at least twice annually and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop EquipmentEquipment using a contractor designated by Landlord. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements legal requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s ownership and/or use of the Rooftop Equipment under this Article 11 and Section 28, (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence and/or use of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but (i) Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts enforce any rights Landlord may have to prevent such interference and (ii) Tenant shall cooperate with Landlord (at no cost to Landlord) enforce to resolve any such interference. In the event the Rooftop Equipment shall cause interference with the use and occupancy of other tenants and occupants of the Building and/or Complex (including without limitation such wireless and/or similar rooftop equipment), Tenant shall (i) immediately cease such use of the Rooftop Equipment causing such interference and promptly remedy such interference and (ii) indemnify and hold Landlord harmless from any Losses which may be imposed upon, incurred by or asserted against Landlord or any of the Landlord Related Parties by any third party and arising out of or in connection with such interference by Tenant (including violations of Law) or any of Tenant’s contractors, agents or employees. In the event such interference may only be remedied by the relocation of the Rooftop Equipment to an alternate location on the Building of the roof, Landlord and Tenant shall reasonably cooperate to identify a suitable location for such relocation, such alternate location to be reasonably approved by Landlord. The Rooftop Installation Area is delivered to Tenant in its “as-is” condition, Landlord makes no representation or warranty, express or implied, as to the fitness of the roof of the Building for the use of the Rooftop Equipment, and to the extent Tenant’s desired Rooftop Equipment may not be used due to interference with existing tenants installations in the Complex, Landlord shall have no liability therefor. Any cables, conduits or other physical connections between the Rooftop Equipment and the Premises shall be concealed within permanent walls, floors, columns and ceilings of the Building and in the shafts of the Building provided for such installations, not damaging the appearance of the Building or reducing the usable or rentable space of the Building. Any installation or maintenance work performed by Tenant, or at Tenant’s direction, shall be performed without unreasonably interfering with Landlord’s rights under or any other tenant’s use of the Complex, and upon completion of such installation and maintenance (initially and from time to time), Tenant shall restore such portions of the Building to a condition reasonably comparable to that existing prior to such installation or maintenance. Upon termination or expiration of this Lease, Tenant shall remove any Rooftop Agreements Equipment installed by it, at its expense, and shall repair and restore the Building to prevent a condition comparable to that existing prior to such interferenceinstallation.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall maintain any Rooftop Equipment in compliance with all Applicable Laws, including the City of Cambridge noise ordinance. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with working around, moving or interfere temporarily relocation Tenant’s Roof Equipment. Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Section 29.32 shall be limited to Building Hours by prior appointment with Building operations the property manager, except in the case of emergencies threatening life or systemspersonal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by provided the charges of Landlord’s roof manufacturerroofer are competitive in the marketplace) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 Section 29.32 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas at least twice annually once a month and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProject.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8, provided such approval shall not be unreasonably withheld, conditioned or delayed. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall maintain any Rooftop Equipment in compliance with all Applicable Laws, including the City of Cambridge noise ordinance. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with working around, moving or interfere temporarily relocation Tenant’s Roof Equipment. Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Section 29.32 shall be limited to Building Hours by prior appointment with Building operations the property manager, except in the case of emergencies threatening life or systemspersonal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 Section 29.32 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located at least twice annually Installation Areas and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute on a nuisance under lawregular basis, as reasonably required. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProject.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work), at such times and in such manner as Landlord may reasonably designate (but in any event, with respect to the Finish Work, in a manner not to unreasonably delay the construction of the Finish Work) and in accordance with all of the applicable provisions of this Lease regarding Tenant Work. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents in accordance with Section 10.05(a10.05(b). Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building or interfere with Building operations or systems. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s 's roof manufacturer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located at least twice annually and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s any rights under any Rooftop Agreements Landlord may have to prevent such interferenceinterference to the extent caused by equipment installed after the applicable Rooftop Equipment.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Tenant's Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant Work. Tenant shall not install or operate the Rooftop Tenant's Equipment until it receives prior written approval of the Construction Documents in accordance with Section 10.05(a10.05(b). Landlord may withhold approval of if the installation or operation of the Rooftop Tenant's Equipment if the same reasonably would be expected to damage the structural integrity of the Building or interfere with Building operations or systemsBuilding. Tenant shall engage Landlord’s 's roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Tenant's Equipment, whether under this Article 11 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer 's roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas at least twice annually once a month and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Tenant's Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Tenant's Equipment shall not violate any Legal Requirements or constitute a nuisance under lawnuisance. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s 's use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s 's insurance premiums as a result of the installation or existence of the Rooftop Tenant's Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interference.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Exhibit B or Section 5.2, as applicable. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Exhibit B or Section 10.05(a)5.2. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall maintain any Rooftop Equipment in compliance with all applicable Laws, including any municipal noise ordinance. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with working around, moving or interfere temporarily relocation Tenant’s Roof Equipment. Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Article 16 shall be limited to normal Building hours by prior appointment with Building operations the property manager, except in the case of emergencies threatening life or systemspersonal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by provided the charges of Landlord’s roof manufacturerroofer are competitive in the marketplace) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 16 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from LandlordXxxxxxxx’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas at least twice annually once a quarter and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProject.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with moving or interfere temporarily relocation Tenant’s Roof Equipment to the extent such Rooftop Equipment is not attached to the roof with Building operations permanent flashing or systemsequivalent measures consistent with the permanent installation of such Rooftop Equipment (as opposed to surface mounting or use of ballasts). Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Article 21 shall be limited to Normal Business Hours by prior appointment with the property manager, except in the case of emergencies threatening life or personal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 21 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from LandlordXxxxxxxx’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas periodically (and at least twice annually two times per year) and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProperty.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to for the Finish WorkTI Allowance in Exhibit B), at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant Work. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents in accordance with Exhibit B or Section 10.05(a). 10.5, as the case may be, which Construction Documents shall include plans and specifications showing the proposed location, height, dimensions, materials, and other technical specifications, together with such appropriate screening or visual barriers as Landlord may withhold approval of reasonably deem appropriate. Such Construction Documents shall also be sufficient to demonstrate that the proposed installation or operation of the Rooftop Equipment if the same reasonably would be expected to shall not damage the structural integrity of the Building or Building, interfere with other Building operations or systems, or impair any applicable roof warranty. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located at least twice annually on a periodic basis as reasonably required by Landlord (taking into account the nature of Tenant’s installations and operational history of the equipment in question) and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interference.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment Antenna at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant Work. Tenant shall not install or operate the Rooftop Equipment Antenna until it receives prior written approval of the Construction Documents in accordance with Section 10.05(a10.05(b). Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same Antenna reasonably would be expected to damage the structural integrity of the Building or interfere with Building operations or systemsBuilding. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall use its reasonable efforts to obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas and Antenna Installation Area at least twice annually once a month and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation of the Antenna or the operation of the Rooftop Equipment. Equipment Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment Antenna shall not violate any Legal Requirements or constitute a nuisance under lawnuisance. Tenant shall pay Landlord on demand (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceAntenna installation.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Section 1.4 (relating to the Generator) and Section 8.3. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)8.3. Subject to the provisions of Section 1.4, Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building, and Landlord may condition its approval of Rooftop Equipment upon Tenant’s structural re-enforcement of the roof as reasonably deemed necessary or desirable by Landlord in order to accommodate the Rooftop Equipment. Tenant shall cooperate with Landlord as reasonably required to accommodate any base Building equipment or interfere Building systems or for the re-roofing of the Building during the Term and Tenant shall be responsible for any costs associated with Building operations working around, moving or systemstemporarily relocating Tenant’s Roof Equipment. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 18 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified employee or contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Area at least twice annually quarterly and as often as recommended by the manufacturer of any Rooftop Equipment and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Base Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Area and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide be (i) designed and installed in every a manner consistent with a first-class laboratory building and in compliance with Applicable Laws, including F.C.C. or other lease of space in the Building that permits rooftop accessregulations, and (ii) shall be screened in every license or other agreement regarding use a manner consistent with a first-class laboratory building so as not to be visible from the ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProperty.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with moving or interfere temporarily relocation Tenant’s Roof Equipment to the extent such Rooftop Equipment is not attached to the roof with Building operations permanent flashing or systemsequivalent measures consistent with the permanent installation of such Rooftop Equipment (as opposed to surface mounting or use of ballasts). Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Article 21 shall be limited to Normal Business Hours by prior appointment with the property manager, except in the case of emergencies threatening life or personal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 21 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas periodically (and at least twice annually two times per year) and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProperty.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall maintain any Rooftop Equipment in compliance with all Applicable Laws, including the City of Cambridge noise ordinance. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with working around, moving or interfere temporarily relocation Tenant’s Roof Equipment. Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Section 29.33 shall be limited to Building Hours by prior appointment with Building operations the property manager, except in the case of emergencies threatening life or systemspersonal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 Section 29.33 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas at least twice annually once every six (6) months and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProject.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building during the Lease term and Tenant shall be responsible for any costs associated with moving or interfere temporarily relocation Tenant’s Roof Equipment to the extent such Rooftop Equipment is not attached to the roof with Building operations 56 permanent flashing or systemsequivalent measures consistent with the permanent installation of such Rooftop Equipment (as opposed to surface mounting or use of ballasts). Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 21 or otherwise, and shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified contractor to inspect areas on the rooftop where the Rooftop Equipment is located Installation Areas periodically (and at least twice annually two times per year) and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. Tenant covenants that the installation, existence, maintenance and operation of the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Areas and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord shall provide in every other lease of space in the Building that permits rooftop access, and in every license or other agreement regarding use of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interference.

Installation and Maintenance of Rooftop Equipment. Tenant shall install the Rooftop Equipment at its sole cost and expense (except as otherwise provided with respect to the Finish Work)expense, at such times and in such manner as Landlord may reasonably designate and in accordance with all of the applicable provisions of this Lease regarding Tenant WorkLease, including without limitation Article 8. Tenant shall not install or operate the Rooftop Equipment until it receives prior written approval of the Construction Documents plans for such work in accordance with Section 10.05(a)Article 8, which approval shall not be unreasonably withheld, conditioned or delayed. Landlord may withhold approval of if the installation or operation of the Rooftop Equipment if the same reasonably would be expected to damage the structural integrity of the Building. Tenant shall cooperate with Landlord as reasonably required to accommodate any re-roofing of the Building by Landlord during the Term and Tenant shall be responsible for any and all costs associated with moving or interfere temporarily relocating Tenant’s Roof Equipment, provided Landlord gives Tenant reasonable prior written notice of any need to move or relocate Tenant’s Roof Equipment. Landlord shall use commercially reasonable efforts to minimize interference with Building operations the operation of Tenant’s Roof Equipment as a result of any such re-roofing work. Tenant’s access to the rooftop for the purposes of exercising its rights and obligations under this Article 21 shall be limited to Normal Business Hours by prior appointment with the property manager, except in the case of emergencies threatening life or systemspersonal property. Tenant shall engage Landlord’s roofer (or another roofing contractor reasonably approved by Landlord and approved by Landlord’s roof manufacturer) before beginning any rooftop installations or repairs of the Rooftop Equipment, whether under this Article 11 21 or otherwise, and and, provided that Tenant shall have received a copy thereof, shall always comply with the roof warranty governing the protection of the roof and modifications to the roof. Tenant shall obtain a letter from Landlord’s roof manufacturer roofer following completion of such work stating that the roof warranty remains in effect. If Tenant installs Rooftop Equipment in the Rooftop Installation Area, if required pursuant to the terms of the roof warranty. Tenant, at its sole cost and expense, shall cause a qualified roofer to inspect areas on the rooftop where the Rooftop Equipment is located Installation Area at least twice annually once a month and correct any loose bolts, fittings or other appurtenances and shall repair any damage to the roof caused by the installation or operation of the Rooftop Equipment. If Tenant covenants that the installation, existence, maintenance and operation of installs Rooftop Equipment in the Rooftop Equipment shall not violate any Legal Requirements or constitute a nuisance under law. Installation Area, Tenant shall pay Landlord on demand following a written request therefor, with the next payment of Rent, (i) all applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Rooftop Equipment under this Article 11 Installation Area and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation or existence of the Rooftop Equipment. Landlord All Rooftop Equipment shall provide in every other lease of space in be screened or otherwise designed so that it is not visible from the Building that permits rooftop access, and in every license or other agreement regarding use ground level of the roof of the Building, (any of the foregoing, a “Rooftop Agreement”) that if such other tenant’s rooftop equipment interferes with Tenant’s Rooftop Equipment, such other tenant will remove or relocate its equipment as necessary to avoid such interference. Landlord assumes no responsibility for interference in the operation of the Rooftop Equipment caused by other tenants’ equipment, or for interference in the operation of other tenants’ equipment caused by the Rooftop Equipment, but Landlord shall reasonably cooperate with Tenant (at no cost to Landlord) to resolve any such interference and shall use commercially reasonable efforts to (at no cost to Landlord) enforce Landlord’s rights under any Rooftop Agreements to prevent such interferenceProperty.