Offices wherever used in this lease, shall not be construed to mean premises used as a store or stores, for the sale or display, at any time of goods, wares or merchandise, of any kind, or as a restaurant, shop, booth, bootblack or other stand, ▇▇▇▇▇▇ shop, or for other similar purposes or for manufacturing. The term "Owner" means a landlord or lessor, and as used in this lease means only the owner, or the mortgagee in possession, for the time being of the land and building (or the owner of a lease of the building or of the land and the building) of which the demised premises form a part, so that in the event of any sale or sales of said land and building or of said lease, or in the event of a lease of said building, or of the land and building, the said Owner shall be and hereby is entirely freed and relieved of all covenants and obligation of Owner hereunder, and it shall be deemed and construed without further agreement between the parties or their successors in interest, or between the parties and the purchaser, at any such sale, or the said lessee of the building, or of the land and building, that the purchaser or the lessee of the building has assumed and agreed to carry out any and all covenants and obligations of Owner, hereunder. The words "re-enter" and "re-entry" as used in this lease are not restricted to their technical legal meaning. The term "business days" as used in this lease shall exclude Saturdays (except such portion thereof as is covered by specific hours in Article 29 hereof). Sundays and all days observed by the State or Federal Government as legal holidays and those designated as holidays by the applicable building service union employees service contract or by the applicable Operating Engineers contract with respect to HVAC service.