CFR›Title 33›Chapter I›Part 161›Subpart A›Subject Group General Rules ContainsSections 161.1–161.6CorpusDaily eCFRDisplayed edition2026-08-11Last updated2026-08-11 Sections 161.1 § 161.1 Purpose and Intent. 161.2 § 161.2 Definitions. 161.3 § 161.3 Applicability. 161.4 § 161.4 Requirement to carry the rules. 161.5 § 161.5 Deviations from the rules. 161.6 § 161.6 Preemption. Next Services, VTS Measures, and Operating Requirements Services, VTS Measures, and Operating Requirements