CFR›Title 49›Subtitle B›Chapter XII›Part 1503›49 CFR Part 1503 Subpart D Citation49 CFR Part 1503 Subpart DContainsSection § 1503.301CorpusDaily eCFRDisplayed edition2026-08-05Last updated2026-08-05 Subpart D—Non-Civil Penalty Enforcement Sections § 1503.301 § 1503.301 Warning notices and letters of correction. Authority6 U.S.C. 1142; 18 U.S.C. 6002; 28 U.S.C. 2461 (note); 49 U.S.C. 114, 20109, 31105, 40113-40114, 40119, 44901-44907, 44939, 46101-46107, 46109-46110, 46301, 46305, 46311, 46313-46314; Pub. L. 110-53 (121 Stat. 266, Aug. 3, 2007) secs. 1408 (6 U.S.C. 1137), 1501 (6 U.S.C. 1151), 1517 (6 U.S.C. 1167), and 1534 (6 U.S.C. 1184).Source74 FR 36039, July 21, 2009, unless otherwise noted.