49 CFR 40.27 : Transportation (§ 1.1 To Parts 1581-1699) — (§ 1.1 To Appendix To Subtitle A) — Office Of The Secretary Of Transportation (§ 1.1 To Appendix To Subtitle A) — Procedures For Transportation Workplace Drug And Alcohol Testing Programs (§ 40.1 To Appendix H To Part 40) — Employer Responsibilities (§ 40.11 To § 40.29) — May an employer require an employee to sign a consent or release in connection with the DOT drug and alcohol testing program?

4 Aug 2016

No, as an employer, you must not require an employee to sign a consent, release, waiver of liability, or indemnification agreement with respect to any part of the drug or alcohol testing process covered by this part (including, but not limited to, collections, laboratory testing, MRO and SAP services).

49 CFR 40.27
[66 FR 41950, Aug. 9, 2001]