Subpart F—Drug Testing Laboratories

1. CFR
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3. Title 49
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5. Subtitle A
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7. Part 40
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9. Subpart F

Sections

Section numbering in the official eCFR can be non-consecutive. Omitted section numbers are not treated here as reserved unless the source explicitly labels them that way.

• 40.81
  § 40.81 What laboratories may be used for DOT drug testing?
• 40.82
  § 40.82 What drugs do laboratories test for?
• 40.83
  § 40.83 How do laboratories process incoming specimens?
• 40.84
  § 40.84 How long does the laboratory retain specimens after testing?
• 40.85
  § 40.85 What are the cutoff concentrations for urine drug tests?
• 40.86
  § 40.86 What is urine validity testing, and are laboratories required to conduct it?
• 40.87
  § 40.87 What validity tests must laboratories conduct on primary urine specimens?
• 40.88
  § 40.88 What criteria do laboratories use to establish that a urine specimen is dilute or substituted?
• 40.89
  § 40.89 What are the adulterant cutoff concentrations for initial and confirmation urine tests?
• 40.90
  § 40.90 What criteria do laboratories use to establish that a urine specimen is invalid?
• 40.91
  § 40.91 What are the cutoff concentrations for oral fluid drug tests?
• 40.92
  § 40.92 What is oral fluid validity testing, and are laboratories required to conduct it?
• 40.93
  § 40.93 What validity tests must laboratories conduct on primary oral fluid specimens?
• 40.97
  § 40.97 What do laboratories report and how do they report it?
• 40.101
  § 40.101 What relationship may a laboratory have with an MRO?
• 40.107
  § 40.107 Who may inspect laboratories?
• 40.109
  § 40.109 What documentation must the laboratory keep, and for how long?
• 40.111
  § 40.111 When and how must a laboratory disclose statistical summaries and other information it maintains?