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Reading the regulations as they stood on May 2, 2023. Current text may differ.Switch to current
Historical textIn force on May 2, 2023Source: eCFR

§ 40.181 What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?

Wording effective May 2, 2023, superseded June 1, 2023.

eCFR as of May 2, 2023 ↗
What changedOct. 1, 2008 wording → May 2, 2023 wording+12 added−0 removedHide

Link to an amendment published at 88 FR 27646, May 2, 2023.
As the laboratory testing the split specimen, you must test the split specimen using the confirmatory tests for creatinine and specific gravity, and using the confirmatory criteria set forth in § 40.93(b).
[73 FR 35973, June 25, 2008]

49 CFR § 40.181 — What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?. Text in force on May 2, 2023. This wording effective May 2, 2023 to June 1, 2023. Source: eCFR as of May 2, 2023, https://www.ecfr.gov/on/2023-05-02/title-49/section-40.181. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.181?asof=2023-05-02, on October 26, 2026. Unofficial compilation; verify against the official source.

Link to an amendment published at 88 FR 27646, May 2, 2023.

As the laboratory testing the split specimen, you must test the split specimen using the confirmatory tests for creatinine and specific gravity, and using the confirmatory criteria set forth in § 40.93(b).

[73 FR 35973, June 25, 2008]

Amendment history

4 distinct wordings on file since Oct. 1, 2001
  1. June 1, 2023 → presenteCFR, day-precisediff vs. previous
    [88 FR 27646, May 2, 2023]
  2. May 2, 2023 → June 1, 2023eCFR, day-precisediff vs. previousviewing
    [73 FR 35973, June 25, 2008]
  3. Oct. 1, 2008 → May 2, 2023annual editions 2008–2016diff vs. previous
    [73 FR 35973, June 25, 2008]
  4. Oct. 1, 2001 → Oct. 1, 2008annual editions 2001–2007

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.