N.Y. Comp. Codes R. & Regs. tit. 9, § 1628-4.2
(b) Purchases of less than $10,000 do not require bidding under the following arrangements and, when economically feasible, should be utilized to the fullest extent possible. Although bidding is not required, approval of the division is necessary under all of these arrangements for any purchase in excess of amount stated in budget approval letter. Purchases in excess of $10,000 must be bid in accordance with section 151 of the Public Housing Law.