"A team shall consist of a minimum of nine (9) players and a maximum oftwelve (12) players if the two (2) optional Extra Player (EP) and the TwinPlayer are used. Teams can play a maximum of nine (9) players on defense.EXCEPTION: NON CHAMPIONSHIP PLAY (refer Rule 1 Sec 17) –"
Rule 1 Sec 17 - Championship Play designates tournaments that carry the title of NIT,STATE, and REGIONAL AND WORLD SERIES
So any tournament that is not designated Championship Play you can start with 8 players in bracket play.