N.Y. County Law § 150-a

§ 150-a. County legislative body, other than board of supervisors. 1.\nAll the functions, powers, obligations and duties which by law are\npossessed by or vested in the board of supervisors of a county may be\nexercised by an elected county legislative body, by whatsoever name\ndesignated, which shall, pursuant to law, or order or judgement of a\ncourt of competent jurisdiction, be established in place of the board of\nsupervisors of such county. All acts heretofore performed by such\nelected county legislative body shall be valid if and to the extent that\nthey would have been valid if performed by the board of supervisors of\nsuch county.\n 2. Whenever the board of supervisors of a county is referred to or\ndesignated in any law, contract or document pertaining to any of the\nfunctions, powers, obligations and duties of such board, such reference\nor designation shall be deemed to include the elected county legislative\nbody, by whatsoever name designated which, pursuant to law, or order or\njudgement of a court of competent jurisdiction, shall have been\nestablished in place of the board of supervisors.\n