CFR›Title 48›Chapter 4›Part 423 ContainsSubparts 423.1–423.6CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 423—ENVIRONMENT, SUSTAINABLE ACQUISITION, AND MATERIAL SAFETY Subparts 423.1 Subpart 423.1—Use of Recovered Materials and Biobased Products Section 423.107 423.3 Subpart 423.3—Notice of Radioactive Material Section 423.301 423.6 Subpart 423.6—Notice of Radioactive Material Section 423.601 Authority5 U.S.C. 301 and 40 U.S.C. 486(c).Source89 FR 81015, Oct. 7, 2024, unless otherwise noted. Previous 422 Part 422—Application of Labor Laws to Government Acquisitions Next 425 Part 425—Foreign Acquisition