Section 3023.501 - Applicability(d) The head of any Component may issue a determination under (FAR) 48 CFR 23.501(d) to exclude the Drug-Free Workplace requirements of FAR subpart 23.5 in contracts supporting undercover law enforcement operations. 71 FR 25770 , May 2, 2006, as amended at 71 FR 48801 , Aug. 22, 2006