33 C.F.R. § 95.030 Evidence of under the influence of alcohol or a dangerous drug.
Title 33 - Navigation and Navigable Waters
Acceptable evidence of when a vessel operator is under the influence of alcohol or a dangerous drug includes, but is not limited to: (a) Personal observation of an individual's manner, disposition, speech, muscular movement, general appearance, or behavior; or, (b) A chemical test. [CGD 84–099, 53 FR 13117, April 21, 1988; CGD 84–009, 53 FR 13117, Apr. 21, 1988, as amended by USCG–1998–4593, 66 FR 1862, Jan. 10, 2001]
Title 33: Navigation and Navigable Waters
PART 95—OPERATING A VESSEL WHILE UNDER THE INFLUENCE OF ALCOHOL OR A DANGEROUS DRUG
§ 95.030 Evidence of under the influence of alcohol or a dangerous drug.

