CFR›Title 48›Chapter 4›Part 423›Subpart 423.3 ContainsSection 423.301CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart 423.3—Notice of Radioactive Material Sections 423.301 423.301 Requirements. Previous 423.1 Subpart 423.1—Use of Recovered Materials and Biobased Products Next 423.6 Subpart 423.6—Notice of Radioactive Material