Final answer:
An alcohol server is required by law to refuse service to a patron if they are visibly intoxicated, ensuring public safety and compliance with responsible service of alcohol regulations. The given statement is true.
Step-by-step explanation:
True, an alcohol server must refuse service if a patron is obviously intoxicated by alcohol, medication, or recreational or illegal drugs. This is a standard required by law in many jurisdictions to ensure public safety and to comply with regulations around the responsible service of alcohol.
It is part of an alcohol server's duty to monitor the intoxication levels of patrons and act accordingly to prevent any potential harm or legal issues that may arise from over-serving an intoxicated individual.