WAC 230-14-190
WAC 230-14-190. Defining "event pull-tab series" and "event round."
Only charitable or nonprofit bingo operators may use event pull-tab series:
(1) "Event pull-tab series" means a pull-tab series that includes a predetermined number of pull-tabs which allow a player to advance to the event round.
(2) "Event round" means a game where the numbers drawn in a bingo game must match pull-tab numbers to determine winners. The winning numbers must be between numbers 1 through 75.