CFR›Title 48›Chapter 5›Part 515 ContainsSubparts 515.2–515.4CorpusDaily eCFRDisplayed edition2026-10-01Last updated2026-10-01 PART 515—CONTRACTING BY NEGOTIATION Subparts 515.2 Subpart 515.2—Solicitation and Receipt of Proposals and Information 515.3 Subpart 515.3—Source Selection 515.4 Subpart 515.4—Contract Pricing Authority40 U.S.C. 121(c).Source64 FR 37214, July 9, 1999, unless otherwise noted.