Alterations Tenant agrees that it will not (a) demolish or undertake any structural alterations of any of the buildings or other improvements erected upon or otherwise comprising the Demised Premises, without the prior written consent of Landlord or (b) make any other alterations which would change the character of the buildings or other improvements comprising the Demised Premises or which would weaken, impair or otherwise in any way affect the structural aspects of integrity of or lessen the value of the Demised Premises and/or the buildings and other improvements comprising the Demised Premises. With respect to any alterations permitted to be made by Tenant pursuant to this Article Ten, Tenant shall (a) pay all costs, expenses and charges thereof, (b) make the same in accordance with all applicable laws and building codes in a good and workmanlike manner, (c) cause the same to be performed by qualified contractors who shall not create any labor or other disturbance at the Demised Premises while performing same, (d) fully and completely indemnify and hold harmless Landlord from and against any mechanic’s liens or other liens or claims in connection with the making thereof and (e) by reason of such alterations, not thereby and (e) by reason of such alterations, not thereby reduce the economic value of the Demised Premises. All alterations, improvements and additions to the Demised Premises permitted to be made by Tenant hereunder, shall be made in accordance with all applicable laws and plans and specifications previously submitted to Landlord for Landlord’s approval, which approval shall not be unreasonably withheld or delayed, and, except for removable trade fixtures, shall at once when made or installed be deemed to have attached to the freehold and to have become the property of Landlord and shall remain for the benefit of Landlord at the end of the term or other expiration of this Lease in as good order and condition as they were when installed, reasonable wear and tear excepted. In the event in the making of such alteration, improvements and additions as herein provided, Tenant further agrees to indemnify and hold harmless Landlord from and against all costs, expenses, liens, claims and damages arising out of, or resulting from the undertaking or making of such alterations, improvements and additions.