Historical textIn force on Sept. 30, 1998Source: annual CFR edition 1996

§ 391.95 Drug use prohibitions.

Wording first on file in the 1996 annual edition, superseded by the 1998 annual edition. The section was then removed.

govinfo, 1996 edition ↗

Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 1996 edition's wording. An amendment that took effect between Oct. 1, 1997 and Sept. 30, 1998 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates. govinfo does not publish the 1997 edition of Parts 300–399 in machine-readable form, so the 1996 text is shown for that year.

49 CFR § 391.95 — Drug use prohibitions.. Text in force on September 30, 1998. This wording effective October 1, 1996 to October 1, 1998. Source: govinfo, 1996 edition, https://www.govinfo.gov/app/details/CFR-1996-title49-vol4/CFR-1996-title49-vol4-sec391-95. Retrieved from FMCSR.com, https://fmcsr.com/reg/391.95?asof=1998-09-30, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) No driver shall be on duty, as defined in § 395.2 of this subchapter, if the driver uses any controlled substances, except as provided in § 391.97 of this part.

(b) No driver shall be on duty, as defined in § 395.2 of this subchapter, if the driver tests positive for use of controlled substances, except as provided in § 391.97 of this part.

(c) A person who tests positive for the use of a controlled substance, as defined in 49 CFR part 40, is medically unqualified to operate a commercial motor vehicle.

(d) A person who refuses to be tested under provisions of this subpart shall not be permitted to operate a commercial motor vehicle. Such refusal shall be treated as a positive test and subject the driver to the restrictions contained in paragraph (c) of this section.

Amendment history

1 distinct wording on file since Oct. 1, 1996

Oct. 1, 1996 → Oct. 1, 1998annual edition 1996viewing

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.