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Historical textIn force on July 23, 2019Source: eCFR

§ 40.89 What is validity testing, and are laboratories required to conduct it?

Wording in the annual edition revised as of Oct. 1, 2008, superseded May 2, 2023.

eCFR as of July 23, 2019 ↗
49 CFR § 40.89 — What is validity testing, and are laboratories required to conduct it?. Text in force on July 23, 2019. This wording effective October 1, 2008 to May 2, 2023. Source: eCFR as of July 23, 2019, https://www.ecfr.gov/on/2019-07-23/title-49/section-40.89. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.89?asof=2019-07-23, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) Specimen validity testing is the evaluation of the specimen to determine if it is consistent with normal human urine. The purpose of validity testing is to determine whether certain adulterants or foreign substances were added to the urine, if the urine was diluted, or if the specimen was substituted.

(b) As a laboratory, you must conduct validity testing.

[65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001; 73 FR 35970, June 25, 2008]

Amendment history

4 distinct wordings on file since Oct. 1, 2001
  1. June 1, 2023 → presenteCFR, day-precisediff vs. previous
    [73 FR 35970, June 25, 2008. Redesignated at 88 FR 27643, May 2, 2023]
  2. May 2, 2023 → June 1, 2023eCFR, day-precisediff vs. previous
    [65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001; 73 FR 35970, June 25, 2008]
  3. Oct. 1, 2008 → May 2, 2023annual editions 2008–2016diff vs. previousviewing
    [65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001; 73 FR 35970, June 25, 2008]
  4. Oct. 1, 2001 → Oct. 1, 2008annual editions 2001–2007
    [65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001]

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.