CFR › Title 28 › Part 550 › §550.4128 CFR §550.41Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkA program of urine testing for drug use shall be established in contract CTCs.(a)Urine surveillance shall be conducted on all inmates serving their sentence in a contract CTC:(1)Who have drug aftercare as a condition of release;(2)Who have a known history of drug abuse; or(3)Who are suspected of using drugs.(b)The Center Director shall establish a schedule for random collection for all other sentenced inmates not identified in paragraph (a) of this section.