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Reading the regulations as they stood on January 16, 2024. Current text may differ.Switch to current
Current textIn force on Jan. 16, 2024Source: eCFR

§ 40.5 Who issues authoritative interpretations of this regulation?

Current wording, first on file in the 2001 annual edition.

eCFR as of January 16, 2024 ↗
49 CFR § 40.5 — Who issues authoritative interpretations of this regulation?. Text in force on January 16, 2024. This wording effective October 1, 2001 to present. Source: eCFR as of January 16, 2024, https://www.ecfr.gov/on/2024-01-16/title-49/section-40.5. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.5?asof=2024-01-16, on October 26, 2026. Unofficial compilation; verify against the official source.

ODAPC and the DOT Office of General Counsel (OGC) provide written interpretations of the provisions of this part. These written DOT interpretations are the only official and authoritative interpretations concerning the provisions of this part. DOT agencies may incorporate ODAPC/OGC interpretations in written guidance they issue concerning drug and alcohol testing matters. Only Part 40 interpretations issued after August 1, 2001, are considered valid.

Amendment history

1 distinct wording on file since Oct. 1, 2001
  1. Oct. 1, 2001 → presentannual editions 2001–2016viewing

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.