This is from an article about a potential required addition to the Spokane Arena for TOURNAMENT PLAY!!! I don't see any basketball seating requirements for regular season
Last year, the PFD said the Arena needed to be expanded to meet a new NCAA requirement of 12,000 “sellable” seats. The Arena already had 12,000 seats but many hundreds of seats are used by media, bands, cheer teams, official and others such that the Arena had less than 12,000 “sellable” seats.
But in June 2012, the NCAA lowered the minimum seat requirements to 10,000.