# 49 C.F.R. § 199.103 (2026): Use of persons who fail or refuse a drug test

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_103

## Section

- **Citation:** 49 C.F.R. § 199.103 (2026)
- **Heading:** Use of persons who fail or refuse a drug test
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 49 CFR: Transportation / Chapter I: PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 199: DRUG AND ALCOHOL TESTING / Subpart B: Drug Testing / § 199.103: § 199.103   Use of persons who fail or refuse a drug test.

## Text

(a) An operator may not knowingly use as an employee any person who—
(1) Fails a drug test required by this part and the medical review officer makes a determination under DOT Procedures; or
(2) Refuses to take a drug test required by this part.
(b) Paragraph (a)(1) of this section does not apply to a person who has—
(1) Passed a drug test under DOT Procedures;
(2) Been considered by the medical review officer in accordance with DOT Procedures and been determined by a substance abuse professional to have successfully completed required education or treatment; and
(3) Not failed a drug test required by this part after returning to duty.
[53 FR 47096, Nov. 21, 1988, as amended by Amdt. 199-2, 54 FR 51850, Dec. 18, 1989. Redesignated and amended by Amdt. 199-19, 66 FR 47118, Sept. 11, 2001]

## Nearby sections

- [49 C.F.R. § 199.100 (2026) § 199.100   Purpose.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_100.md)
- [49 C.F.R. § 199.101 (2026) § 199.101   Anti-drug plan.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_101.md)
- [49 C.F.R. § 199.103 (2026) § 199.103   Use of persons who fail or refuse a drug test.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_103.md)
- [49 C.F.R. § 199.105 (2026) § 199.105   Drug tests required.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_105.md)
- [49 C.F.R. § 199.107 (2026) § 199.107   Drug testing laboratory.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_107.md)
- [49 C.F.R. § 199.109 (2026) § 199.109   Review of drug testing results.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_109.md)
- [49 C.F.R. § 199.113 (2026) § 199.113   Employee assistance program.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_113.md)
- [49 C.F.R. § 199.115 (2026) § 199.115   Contractor employees.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_115.md)
- [49 C.F.R. § 199.117 (2026) § 199.117   Recordkeeping.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_117.md)
- [49 C.F.R. § 199.119 (2026) § 199.119   Reporting of anti-drug testing results.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_119.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T49_P199_S199_103. Check the current official text before relying on it. Not legal advice.