N.Y. Comp. Codes R. & Regs. tit. 8, § 156.6
(a) Pursuant to the provisions of section 1709 of the Education Law, school buses may be leased from sources other than a school district, board of cooperative educational services, or county vocational education and extension board under emergency conditions which shall include but not be limited to the following:
(2) removal of bus from service due to: