N.Y.C. Admin. Code § 6-120: § 6-120 Standards and specifications.

The commissioner of citywide administrative services shall have power to use the laboratory and engineering facilities of any agency, together with the technical staff thereof, in connection with work of preparing and adopting standards and written specifications. The commissioner shall consult freely with the heads and other officials of the various agencies to determine their precise requirements, and shall endeavor to prescribe those standards which meet the needs of the majority of such agencies. After adoption, each standard specification shall, until revised or rescinded, apply alike in terms and effect to every future purchase and contract for the commodity described in such specification. The commissioner of citywide administrative services, however, may exempt any such agency from the use of the commodity described in such standard specification.