Local rules usually supercede ASA Championship Rules, so you would have to go straight to the LD on this one. Since the edict was handed down from the National Office that as of 2010, all balls used in sanctioned ASA play must be optic yellow most major ball manufacturers stopped making the white balls, although I still see some at different sporting goods stores. Better have some yellow balls handy just in case the umpire won't allow the white ones.