CFR›Title 40›Chapter I›Part 300›Subpart A ContainsSections 300.1–300.7CorpusDaily eCFRDisplayed edition2026-05-14Last updated2026-05-14 Subpart A—Introduction Sections 300.1 § 300.1 Purpose and objectives. 300.2 § 300.2 Authority and applicability. 300.3 § 300.3 Scope. 300.4 § 300.4 Abbreviations. 300.5 § 300.5 Definitions. 300.6 § 300.6 Use of number and gender. 300.7 § 300.7 Computation of time. Source59 FR 47416, Sept. 15, 1994, unless otherwise noted. Next Appendix A to Part 300 Appendix A to Part 300—The Hazard Ranking System