CFR›Title 7›Subtitle B›Chapter I›Part 53›Subpart A›Subject Group Miscellaneous ContainsSections 53.20–53.21CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 53.20 § 53.20 Identification. 53.21 § 53.21 Errors in service. Previous Definitions Definitions Next Service Service