Media outlets report that the West Virginia Lottery Commission adopted a new definition of "event" on Tuesday.
The move addresses concerns that bus tour companies in Virginia were promoting day trips to The Greenbrier as casino trips, in violation of the state's historic resort gaming law.
Under the law, only registered overnight guests, or those attending conferences or similar events are permitted to gamble at the casino, if 400 or more rooms are booked.
The revised policy adds unique activities such as weddings and concerts to the definition of "events." Other activities are allowed if they aren't confined exclusively to the casino and meet other requirements.