CFR›Title 50›Chapter IV›Part 451›50 CFR 451.01 Citation50 CFR 451.01CorpusDaily eCFRDisplayed edition2026-09-15Last updated2026-09-15 § 451.01 Definitions.All definitions contained in 50 CFR 450.01 are applicable to this part. Next 451.02 § 451.02 Applications for exemptions.