Two years ago I wrote a referee's guide to Power Puzzle, because so many of the rules were new and confusing. I got collaboration from several state and World Fest refs. Last year's challenge was so much more understandable that I didn't feel it was needed.
VIMS has a description of volunteer positions, such as this one for a FRC referee:
https://my.usfirst.org/vims/positions_frc/referee.htm I thought there had been similar ones for FLL in the past, but I don't see them there now.