N.Y. Public Authorities Law § 1734
5. Notwithstanding the foregoing, the authority may by resolution approved by a vote of its members declare (i) that competitive bidding for non-construction contracts is impractical or inappropriate because of the existence of any of the circumstances hereinafter set forth or (ii) that competitive bidding for construction contracts is impractical or inappropriate because of the existence of the circumstances set forth in paragraph a of this subdivision. Thereafter the authority may proceed to award contracts without complying with the requirements of subdivision two or three of this section. In each case where the authority declares competitive bidding impractical or inappropriate, it shall state the reason therefor in writing and summarize any negotiations that have been conducted and shall be made available upon request. Except for contracts awarded pursuant to paragraphs a, b and c of this subdivision, the authority shall not award any contract pursuant to this subdivision earlier than thirty days from the date on which the authority declares that competitive bidding is impractical or inappropriate. Competitive bidding may only be declared impractical or inappropriate where: a. the existence of an emergency involving danger to life, safety or property requires immediate action and cannot await competitive bidding or the item to be purchased is essential to efficient operation or the adequate provision of service by the city board or the authority and as a consequence of unforeseen circumstance such purchase cannot await competitive bidding; b. the authority receives no responsive bids or only a single responsive bid in response to an invitation for competitive bids; c. the item is available through an existing contract between a vendor and (i) another public authority provided that such other authority utilized a process of competitive bidding or a process of competitive requests for proposals to award such contracts, or (ii) the city board, or (iii) the state of New York, or (iv) the city of New York, provided that in any case when under this paragraph the authority determines that obtaining such item thereby would be in the public interest and sets forth the reason for such determination. The authority shall accept sole responsibility for any payment due the vendor as a result of the authority's order; or d. the authority determines that it is in the public interest to award contracts pursuant to a process for competitive requests for proposals as hereinafter set forth. For purposes of this section, a process for competitive requests for proposals shall mean a method of soliciting proposals and awarding a contract on the basis of a formal evaluation of the characteristics, such as quality, cost, delivery schedule and financing of such proposals against stated selection criteria. Public notice of the requests for proposals shall be given in the same manner as provided in subdivision three of this section and shall include the selection criteria. In the event the authority makes a material change in the selection criteria from those previously stated in the notice, it will inform all proposers of such change and permit proposers to modify their proposals.