CEO David Stevenson new teams who want to enter the NBL must have a venue capacity of 8000 people. (Robbie Stephenson/AAP PHOTOS)CEO David Stevenson new teams who want to enter the NBL must have a venue capacity of 8000 people. (Robbie Stephenson/AAP PHOTOS) Credit: AAPThe NBL is following the AFL in its hardline approach to expansion, insisting potential new clubs must meet venue requirements if they are to enter the league. But the NBL Group chief executive David Stevenson says new teams who want to enter the league must have a venue that hosts about 8000 people. "Having spent a lot of time in the AFL as well, there's always a level of tension between some clubs in the league," he said.