Standard Clauses for use in a New York office lease that provide for alterations to the premises, including plans and specifications, review fees, mechanic's liens, performance bonds, approved contractors, and labor harmony. These Standard Clauses also provide language addressing alterations when the leased premises are located in a landmarked building in New York City and require Landmarks Preservation Commission approvals. These Standard Clauses have integrated notes with important explanations and drafting tips.