CFR›Title 45›Subtitle A›Part 172›45 CFR Part 172 Subpart A Citation45 CFR Part 172 Subpart AContainsSections § 172.100–§ 172.103CorpusDaily eCFRDisplayed edition2026-09-28Last updated2026-09-28 Subpart A—General Provisions Sections § 172.100 § 172.100 Basis, purpose, and scope. § 172.101 § 172.101 Applicability. § 172.102 § 172.102 Definitions. § 172.103 § 172.103 Responsibilities ASTP/ONC may delegate to the RCE. Authority42 U.S.C. 300jj-11; 5 U.S.C. 552.Source89 FR 101810, Dec. 16, 2024, unless otherwise noted.