N.Y.C. Charter § 316: Section 316. Intergovernmental procurement.

Notwithstanding any other requirement of this chapter,

a. any goods may be procured, ordered or awarded through the United States General Services Administration, or any other federal agency if the price is lower than the prevailing market price; any services or construction may be procured, ordered or awarded through the United States General Services Administration, or any other federal agency if the price is fair and reasonable, and

b. any goods may be procured, ordered or awarded through the New York State office of general services, or any other state agency, if the price is lower than the prevailing market price; any services or construction may be procured, ordered or awarded through the New York State office of general services, or any other state agency, if the price is fair and reasonable.