CFR›Title 48›Chapter 1›Part 51 ContainsSection 51.000; Subparts 51.1–51.2CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 51—USE OF GOVERNMENT SOURCES BY CONTRACTORS Contents 51.000 51.000 Scope of part. 51.1 Subpart 51.1—Contractor Use of Government Supply Sources Sections 51.100–51.107 51.2 Subpart 51.2—Contractor Use of Interagency Fleet Management System (IFMS) Sections 51.200–51.205 Authority40 U.S.C. 121(c); 10 U.S.C. chapter 4 and 10 U.S.C. chapter 137 legacy provisions (see 10 U.S.C. 3016); and 51 U.S.C. 20113.Source48 FR 42476, Sept. 19, 1983, unless otherwise noted. Previous 50 Part 50—Extraordinary Contractual Actions and the SAFETY Act Next 52 Part 52—Solicitation Provisions and Contract Clauses