CFR›Title 48›Chapter 1›Part 43 ContainsSection 43.000; Subparts 43.1–43.3CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 43—CONTRACT MODIFICATIONS Contents 43.000 43.000 Scope of part. 43.1 Subpart 43.1—General Sections 43.101–43.107 43.2 Subpart 43.2—Change Orders Sections 43.201–43.205 43.3 Subpart 43.3—Forms Section 43.301 Authority41 U.S.C. 1121(b); 40 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 42386, Sept. 19, 1983, unless otherwise noted. Previous 42 Part 42—Contract Administration and Audit Services Next 44 Part 44—Subcontracting Policies and Procedures