Referees may only sign up for three games for a given Saturday through the Referee Scheduler.  
This is only enforced if someone asks for your game.
Additional games are available as walk ons at the field.
REMEMBER: The Referee Scheduler takes precedence over walk on Referees.

Rules for Practice Games (Prior to Pool Play)
10U
To help as Assistant Referee for your child's/team's game in the U10 division you MUST use the online Referee Scheduler.   All U10 team referees will have until midnight Wednesday before the Saturday game to schedule themselves as an AR for their game.   If there is an open slot starting Thursday morning, it will be available to anyone who wishes to sign up.  Do not walk on the field expecting to take an AR slot without using the Referee Scheduler.

12U and 14U
Referees may AR their own child's/team's game during the practice season (before pool play and playoffs).  We do not allow referees to schedule themselves as Center referee for their own child's/team's game.

16U & 19U
In older divisions, we do not allow referees to schedule to ref their own child's/team's games.  If you wish to referee during one of these games you must go to the game and if there are no assigned referees or there are open positions, you may step up and work the game.