§FMCSR.com
Historical textIn force on Oct. 1, 2000Source: annual CFR editions 1996–2000

§ 382.309 Return-to-duty testing.

Wording first on file in the 1996 annual edition, superseded by the 2001 annual edition.

govinfo, 2000 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2000 edition's wording. An amendment that took effect between Oct. 1, 2000 and Oct. 1, 2000 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 382.309 — Return-to-duty testing.. Text in force on October 1, 2000. This wording effective October 1, 1996 to October 1, 2001. Source: govinfo, 2000 edition, https://www.govinfo.gov/app/details/CFR-2000-title49-vol4/CFR-2000-title49-vol4-sec382-309. Retrieved from FMCSR.com, https://fmcsr.com/reg/382.309?asof=2000-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) Each employer shall ensure that before a driver returns to duty requiring the performance of a safety-sensitive function after engaging in conduct prohibited by subpart B of this part concerning alcohol, the driver shall undergo a return-to-duty alcohol test with a result indicating an alcohol concentration of less than 0.02.

(b) Each employer shall ensure that before a driver returns to duty requiring the performance of a safety-sensitive function after engaging in conduct prohibited by subpart B of this part concerning controlled substances, the driver shall undergo a return-to-duty controlled substances test with a result indicating a verified negative result for controlled substances use.

Amendment history

3 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2010 → presentannual editions 2010–2016diff vs. previous
  2. Oct. 1, 2001 → Oct. 1, 2010annual editions 2001–2009diff vs. previous
  3. Oct. 1, 1996 → Oct. 1, 2001annual editions 1996–2000viewing

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.