N.Y.C. Admin. Code § 24-348: § 24-348 Advertisement for sealed bids or proposals for work or materials; publication.

When the form of any contract with its specifications and the form of bond for the performance thereof shall have been approved as provided for in section 24-347, the commissioner shall advertise for sealed bids or for proposals for the doing of the work or the furnishing of the materials called for in such approved form of contract. Such advertisement shall be published in the City Record and in two daily newspapers published in the city, to be designated by the commissioner, for at least fifteen days consecutively before the time fixed for the closing of the bid box.