Historical textIn force on Oct. 1, 2002Source: annual CFR editions 2001–2007
§ 40.181 What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?
Wording first on file in the 2001 annual edition, superseded by the 2008 annual edition.
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2002 edition's wording. An amendment that took effect between Oct. 1, 2002 and Oct. 1, 2002 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
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 October 1, 2002. This wording effective October 1, 2001 to October 1, 2008. Source: govinfo, 2002 edition, https://www.govinfo.gov/app/details/CFR-2002-title49-vol1/CFR-2002-title49-vol1-sec40-181. Retrieved from FMCSR.com, https://fmcsr.com/reg/40.181?asof=2002-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.
As the laboratory testing the split specimen, you must test the split specimen using the criteria of § 40.93(b), just as you would do for a primary specimen. The result of the primary specimen is reconfirmed if the split specimen meets these criteria.
Amendment history
4 distinct wordings on file since Oct. 1, 2001- [88 FR 27646, May 2, 2023]
- [73 FR 35973, June 25, 2008]
- [73 FR 35973, June 25, 2008]
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.