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Chapter 4: The Legal Requirements of Boating
Alcohol and Drugs

Idaho law prohibits anyone from operating or being in actual physical control of any vessel while under the influence of alcohol, drugs, or other intoxicating substances. Alcohol and drugs cause impaired balance, blurred vision, poor coordination, impaired judgment, and slower reaction times. Alcohol contributes to about one-third of all fatal boating accidents nationwide. Read more about the effects and risks of consuming alcohol.

Idaho law states that a person is considered to be “under the influence” if:

  • He or she is 21 years of age or older and has a blood alcohol concentration of 0.08% or higher or …
  • He or she is under 21 years of age and has a blood alcohol concentration of 0.02% or higher.

Idaho law establishes the following penalties.

  • Those convicted of operating under the influence of alcohol or drugs may:
    • Receive a maximum fine of $1,000 and/or a sentence of six months in the county jail and …
    • Be required to attend and successfully complete a course on safe
      boating and …
    • Lose their privileges to operate a vessel for up to two years.
  • Any person causing great bodily harm, permanent disability, or permanent disfigurement to any person other than himself or herself while operating under the influence of alcohol or drugs is guilty of a felony and will:
    • Be sentenced to the State Board of Corrections for up to five years, with a minimum sentence of 30 days and …
    • Be fined up to $5,000 and …
    • Have his or her privileges to operate a vessel suspended for a minimum of one year, not to exceed two years, after release from prison.

By operating a vessel on Idaho waters, you have consented to be tested for the presence of alcohol, drugs, or other intoxicating substances if requested by a peace officer. Any person refusing to submit to testing for the presence of alcohol, drugs, or other intoxicating substances will be assessed a civil penalty of $200.

Don't drink and boat!

Areas of Impairment Due to Blood Alcohol Concentration (BAC)

Areas of impairment due to blood alcohol concentration

Because you can drink faster than your system can burn off the alcohol, there is an increasing level of alcohol in your blood. This level is referred to as Blood Alcohol Concentration (BAC).

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