§FMCSR.com
Historical textIn force on Oct. 1, 2012Source: annual CFR editions 2008–2016

§ 40.105 What happens if the laboratory reports a result different from that expected for a blind specimen?

Wording in the annual edition revised as of Oct. 1, 2008, superseded November 13, 2017.

govinfo, 2012 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2012 edition's wording. An amendment that took effect between Oct. 1, 2012 and Oct. 1, 2012 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 40.105 — What happens if the laboratory reports a result different from that expected for a blind specimen?. Text in force on October 1, 2012. This wording effective October 1, 2008 to November 13, 2017. Source: govinfo, 2012 edition, https://www.govinfo.gov/app/details/CFR-2012-title49-vol1/CFR-2012-title49-vol1-sec40-105. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.105?asof=2012-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) If you are an employer, MRO, or C/TPA who submits a blind specimen, and if the result reported to the MRO is different from the result expected, you must investigate the discrepancy.

(b) If the unexpected result is a false negative, you must provide the laboratory with the expected results (obtained from the supplier of the blind specimen), and direct the laboratory to determine the reason for the discrepancy.

(c) If the unexpected result is a false positive, adulterated, or substituted result, you must provide the laboratory with the expected results (obtained from the supplier of the blind specimen), and direct the laboratory to determine the reason for the discrepancy. You must also notify ODAPC of the discrepancy by telephone (202-366-3784) or e-mail (addresses are listed on the ODAPC Web site, http://www.dot.gov/ost/dapc). ODAPC will notify HHS who will take appropriate action.

[65 FR 79526, Dec. 19, 2000, as amended at 73 FR 35971, June 25, 2008]

Amendment history

4 distinct wordings on file since Oct. 1, 1996
  1. Nov. 13, 2017 → Jan. 1, 2018eCFR, day-precisediff vs. previous
    [65 FR 79526, Dec. 19, 2000, as amended at 73 FR 35971, June 25, 2008]
  2. Oct. 1, 2008 → Nov. 13, 2017annual editions 2008–2016diff vs. previousviewing
    [65 FR 79526, Dec. 19, 2000, as amended at 73 FR 35971, June 25, 2008]
  3. Oct. 1, 2001 → Oct. 1, 2008annual editions 2001–2007diff vs. previous
  4. Oct. 1, 1996 → Oct. 1, 2001annual editions 1996–2000

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.