Under what condition is a liquor establishment not responsible for the actions of an intoxicated patron?

A liquor establishment is not held responsible for the actions of an intoxicated patron when staff did not know the patron was intoxicated. This principle is grounded in the idea of "reasonable care." If staff members are not aware of a patron's level of intoxication, they cannot reasonably be expected to intervene or to stop serving alcohol. Moreover, establishments have a duty to act in a responsible manner; however, this responsibility is contingent on their awareness of the patron's condition.

The other options present situations where the establishment may still hold some level of responsibility. If a patron wasn't served any alcohol, it suggests no contribution from the establishment to their condition. If the patron did not cause any harm, liability might still hinge on the potential risk factors that existed. Finally, during a special event, the rules governing responsible service of alcohol and the obligation of staff to monitor patron behavior remain unchanged, so this circumstance would not absolve the establishment of responsibility. Understanding these principles is crucial for anyone working in or managing a liquor-serving establishment in British Columbia.