What is the relationship between BAC and observable signs of intoxication?
Explanation
BAC and observable impairment correlate broadly but imperfectly; tolerant drinkers may hide signs at 0.10%, while sensitive drinkers show signs at 0.04%. California law (§25602) does not require chemical proof — observation by a trained server is the lawful and practical standard. Servers must therefore err on the side of refusal when SCAN signs appear, regardless of the count of drinks the patron has consumed at your bar.
Law Reference: RBS Training Curriculum; Cal. Bus. & Prof. Code §25602This topic, taught in full in the California RBS (Responsible Beverage Service) guide. California RBS — Responsible Beverage Service Study Guide (2026) — PDF + EPUB, $9.99 · 14-day refund →
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Related questions on this topic
- Which of the following is NOT a reliable indicator of intoxication and should NOT, by itself, be used to refuse service?
- Cumulative observation is a key RBS skill. It means:
- A patron suddenly becomes tearful and says, 'I don't see the point in anything anymore — I just want it all to end.' The MOST appropriate response is:
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- Impairment from alcohol typically progresses in which general order?
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