N.Y.C. Charter § 1110: Section 1110. Trusteeship of public property.

The council and the council members and all other officers and employees of the city are hereby declared respectively trustees of the property, funds and effects of the city, so far as such property, funds and effects are or may be committed to their management or control. Such trustees are hereby made subject to all the duties and responsibilities imposed by law on trustees, and such duties and responsibilities may be enforced by the city or by any officer thereof.