Their use, if not used for communication during
the actual competition when a competitor is on the track or completing a
trial,
There's the problem. I believe that the CIF/ officials believe the "competition" to be from the time of the first thrower's first throw until the last thrower's last throw, meaning that the use of electronic equipment would still be prohibited even after an athlete has thrown and is waiting for his next throw. I would err on the side of caution, it isn't worth getting DQ'ed to watch a video. In high school I competed in the CIF-SS and won a divisional title in the discus, and i got to know some of the officials. I don't wanna speak on it too much, but they aren't exactly the most... lenient. I also go to college in the southland, and the college officials are also not what I would call "lenient".