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Legal and Ethical Standards Flashcards

7 cards from real DUI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Legal and Ethical Standards flashcards as text

  1. What is the legal blood alcohol concentration (BAC) limit for adult non-commercial drivers in the United States?

    Answer: 0.08%

    The federal standard, adopted by all 50 states, sets the per se BAC limit for adult non-commercial drivers at 0.08%.

  2. Under implied consent laws, what does a driver agree to by obtaining a driver's license?

    Answer: To submit to chemical testing if lawfully arrested for DUI

    Implied consent laws mean that by obtaining a driver's license, a person agrees to submit to chemical testing (breath, blood, or urine) if lawfully arrested for DUI.

  3. What is 'administrative per se' in the context of DUI law?

    Answer: An automatic license suspension triggered by a BAC at or above the legal limit, regardless of criminal outcome

    Administrative per se allows the DMV to automatically suspend a driver's license when their BAC meets or exceeds the legal limit, separate from any criminal DUI proceedings.

  4. What is the BAC limit for commercial vehicle drivers under federal law?

    Answer: 0.04%

    Commercial drivers are held to a stricter standard of 0.04% BAC because of the increased danger posed by large commercial vehicles.

  5. Which federal act established the national minimum drinking age of 21 and tied it to federal highway funding?

    Answer: The National Minimum Drinking Age Act of 1984

    The National Minimum Drinking Age Act of 1984 required states to set the minimum drinking age at 21 or face a 10% reduction in federal highway funding.

  6. What ethical obligation does a DUI instructor have when a client makes a credible threat of serious harm to an identifiable person?

    Answer: Breach confidentiality and warn the potential victim and/or law enforcement

    DUI instructors must breach confidentiality and warn when a client poses a credible threat of serious harm to an identifiable person, following the duty-to-warn principle established in Tarasoff v. Regents.

  7. What is a 'zero tolerance' law in the context of underage DUI?

    Answer: A law prohibiting drivers under 21 from driving with any detectable BAC, typically 0.00% to 0.02%

    Zero tolerance laws prohibit drivers under 21 from operating a vehicle with any measurable BAC, typically set at 0.00% to 0.02%, because consuming alcohol is illegal for that age group.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. tdlr.texas.gov — Test delivery, retake policy, score release, test dates, time limit, renewal, score validity, eligibility, fees · verified Oct 2026
Legal and Ethical Standards Flashcards — DUI Study Cards with Answers