CFR›Title 28›Chapter V›Part 550›Subpart D ContainsSections 550.30–550.31CorpusDaily eCFRDisplayed edition2026-05-12Last updated2026-05-12 Subpart D—Urine Surveillance Sections 550.30 § 550.30 Purpose and scope. 550.31 § 550.31 Procedures. Source62 FR 45292, Aug. 26, 1997, unless otherwise noted. Previous B Subpart B—Alcohol Testing Next E Subpart E—Drug Services (Urine Surveillance and Counseling for Sentenced Inmates in Contract CTCs)