If you are an assignor and can’t find referees to work your games, first check with your ARA to see what options might be available (such as contacting other assignors in nearby locations for help). Should you still have problems (particularly in tournaments where several tournaments are scheduled on the same date across the state), contact the State Assignor Coordinator (SAC) to see if he/she can help you locate referees in other areas within the state of possibly in a neighboring state.
Make sure you obtain your referees far enough in advance so you can see if you are going to have a problem getting referees. Waiting until the last minute to look for referees is never a good idea.