N.Y.C. Charter § 1120: Section 1120. Additional powers and duties.

Any elected or appointed officer of the city or any board or commission or any member thereof shall, in addition to the powers and duties vested in such officer, board or commission by this charter, perform any duties and exercise any powers vested in such officer or in such board or commission by any other provision of law and any power necessary to carry out the powers and duties vested in such officer, board or commission.