N.Y. Gen. Mun. Law § 209-D
Notwithstanding any other provision of law, no contract shall be made by a municipality or fire district whereby the services of a volunteer fire department or company are to be supplied outside of such municipality or fire district to provide (1) fire protection, (2) emergency service in case of accidents, calamities or other emergencies, or (3) general ambulance service pursuant to the provisions of section two hundred nine-b of this article, unless such volunteer fire department or company consents thereto. Any such contract may provide for the payment of a portion of the consideration expressed therein to such volunteer fire department or company to be expended for fire department or company purposes only. If the municipality or fire district owns all of the fire apparatus to be used in carrying out the contract, the portion of the consideration which may be paid to such volunteer fire department or company shall not exceed thirty-five per centum, unless a greater portion was being so paid on March fifteenth, nineteen hundred forty-one, under a contract entered into on or before that date, in which event a not greater portion than was being paid on said date may be paid to such volunteer fire department or company in respect to any contract entered into on or after such date. No payments shall be made to individual volunteer firefighters as compensation for rendering such outside service.
N.Y. Gen. Mun. Law § 209-D