N.Y.C. Admin. Code § 11-112: § 11-112 Authorization of subordinates to sign checks and warrants.

Notwithstanding any provision of the charter, the comptroller or commissioner of finance may designate and authorize any deputies, assistant deputies, or employees to sign, each in his or her own name and in place of and for the comptroller or commissioner of finance, respectively, any or all checks or warrants, including those issued against sinking fund and trust fund bank accounts. A warrant or check so signed shall be of the same force and effect as if signed by the comptroller or commissioner of finance, respectively. The designation or designations of deputies shall be made in writing in the manner set forth in section ninety-four of the charter. The designation or designations of assistant deputies or employees shall be in writing, signed in duplicate by the comptroller or the commissioner of finance, respectively, and shall be duly filed and remain of record in the office of the comptroller and the department of finance. The period for which each such designation of deputies, assistant deputies and employees shall continue in force shall be specified therein and may be terminated by the comptroller or commissioner of finance, respectively, at any time by filing in the same office or offices in which the designation has been filed a written notice of such termination signed by the comptroller or commissioner of finance, respectively.