N.Y.C. Charter § 319: Section 319. Competitive sealed proposals.

In accordance with section three hundred seventeen, proposals may be solicited through a request for proposals with award to the responsible offeror whose proposal is determined to be the most advantageous to the city, taking into consideration the price and such other factors or criteria as are set forth in the request for proposals. No other factors or criteria shall be used in the evaluation and award of the contract except those specified in the request for proposals. Discussions may be conducted with responsible offerors who submit proposals, provided that offerors shall be accorded fair treatment with respect to any opportunity for discussion and revision of the proposals.