CFR > Title 50 > Chapter II > Subchapter F > Part 253 > Subpart A CFR > Title 50 > Chapter II > Subchapter F > Part 253 > Subpart A – General Current as of: 2024 | Check for updates | Other versions § 253.1 Purpose Terms Used In CFR > Title 50 > Chapter II > Subchapter F > Part 253 > Subpart A - GeneralPublic law: A public bill or joint resolution that has passed both chambers and been enacted into law. Public laws have general applicability nationwide.