# 33 CFR § 95.035: Reasonable cause for directing a chemical test

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-33-95.035

## Section

- **Citation:** 33 CFR § 95.035
- **Heading:** Reasonable cause for directing a chemical test
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 33—Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER F—VESSEL OPERATING REGULATIONS > PART 95—OPERATING A VESSEL WHILE UNDER THE INFLUENCE OF ALCOHOL OR A DANGEROUS DRUG

## Text

(a) Only a law enforcement officer or a marine employer may direct an individual operating a vessel to undergo a chemical test when reasonable cause exists. Reasonable cause exists when:
(1) The individual was directly involved in the occurrence of a marine casualty as defined in Chapter 61 of Title 46, United States Code, or
(2) The individual is suspected of being in violation of the standards in §§ 95.020 or 95.025.
(b) When an individual is directed to undergo a chemical test, the individual to be tested must be informed of that fact and directed to undergo a test as soon as is practicable.
(c) When practicable, a marine employer should base a determination of the existence of reasonable cause, under paragraph (a)(2) of this section, on observation by two persons.
[CGD 84-099, 52 FR 47532, Dec. 14, 1987; CGD 84-099, 53 FR 13117, Apr. 1, 1988]

## Nearby sections

- [33 CFR § 95.001 § 95.001 Purpose.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.001.md)
- [33 CFR § 95.005 § 95.005 Applicability.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.005.md)
- [33 CFR § 95.010 § 95.010 Definition of terms as used in this part.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.010.md)
- [33 CFR § 95.015 § 95.015 Operating a vessel.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.015.md)
- [33 CFR § 95.020 § 95.020 Standard for under the influence of alcohol or a dangerous drug.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.020.md)
- [33 CFR § 95.025 § 95.025 Adoption of State blood alcohol concentration levels.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.025.md)
- [33 CFR § 95.030 § 95.030 Evidence of under the influence of alcohol or a dangerous drug.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.030.md)
- [33 CFR § 95.035 § 95.035 Reasonable cause for directing a chemical test.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.035.md)
- [33 CFR § 95.040 § 95.040 Refusal to submit to testing.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.040.md)
- [33 CFR § 95.045 § 95.045 General operating rules for vessels inspected, or subject to inspection, under Chapter 33 of Title 46 United States Code.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.045.md)
- [33 CFR § 95.050 § 95.050 Responsibility for compliance.](https://www.frixlaw.com/law-library/statutes/ecfr-33-95.050.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-33-95.035. Check the current official text before relying on it. Not legal advice.