CFR›Title 40›Chapter I›Part 723 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 723—PREMANUFACTURE NOTIFICATION EXEMPTIONS Subparts A Subpart A [Reserved] B Subpart B—Specific Exemptions Sections 723.50–723.250 Authority15 U.S.C. 2604. Previous 721 Part 721—Significant New Uses of Chemical Substances Next 725 Part 725—Reporting Requirements and Review Processes for Microorganisms