CFR›Title 48›Chapter 16›Part 1643 ContainsSubpart 1643.2CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 1643—CONTRACT MODIFICATIONS Subparts 1643.2 Subpart 1643.2—Changes Section 1643.205-70 Authority5 U.S.C. 8913; 40 U.S.C. 486(c); 48 CFR 1.301.Source62 FR 47575, Sept. 10, 1997, unless otherwise noted. Previous 1642 Part 1642—Contract Administration Next 1644 Part 1644—Subcontracting Policies and Procedures