It would be very nice for all the officials to have one association. It's a pain in the butt to remember to register with both associations/unions because the dates you can register are different (or at least have been in the past). I've heard of officials going through the entire basketball season, doing both girls and boys games, then getting to the end of the season and not getting a tourney game. After investigating the issue, they come to find out that they were never registered for the girls' union
Opps!
-Josh