N.Y.C. Admin. Code § 28-313.2: § 28-313.2 Retroactive requirement for accessible building entrances.

The provisions of item 4 of section 1111.1 of the New York city building code requiring signage to be posted at accessible entrances where an inaccessible building entrance exists shall apply retroactively to all buildings that have such accessible entrances.

Exception: Accessible entrance signs that are posted at building entrances in compliance with the Americans with Disabilities Act of 1990 shall be deemed to be in compliance with section 1111.1 of the New York city building code subject to the inclusion on or adjacent to such signage of a contact telephone number or instructions to gain access if an otherwise accessible building entrance is subject to locking.