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Reading the regulations as they stood on November 27, 2023. Current text may differ.Switch to current
Current textIn force on Nov. 27, 2023Source: eCFR

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

Current wording, effective June 1, 2023.

eCFR as of November 27, 2023 ↗
49 CFR § 40.86 — What is urine validity testing, and are laboratories required to conduct it?. Text in force on November 27, 2023. This wording effective June 1, 2023 to present. Source: eCFR as of November 27, 2023, https://www.ecfr.gov/on/2023-11-27/title-49/section-40.86. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.86?asof=2023-11-27, 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. Redesignated at 88 FR 27643, May 2, 2023]

Amendment history

1 distinct wording on file since June 1, 2023
  1. June 1, 2023 → presenteCFR, day-preciseviewing
    [65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001; 73 FR 35970, June 25, 2008. Redesignated at 88 FR 27643, May 2, 2023]

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.