CFR›Title 49›Subtitle B›Chapter VI›Part 655›Subpart F ContainsSections 655.51–655.60CorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 Subpart F—Drug and Alcohol Testing Procedures Sections 655.51 § 655.51 Compliance with testing procedures requirements. 655.52 § 655.52 Substance abuse professional (SAP). 655.53 § 655.53 Supervisor acting as collection site personnel. 655.54-655.60 §§ 655.54-655.60 [Reserved] Previous E Subpart E—Types of Testing Next G Subpart G—Consequences