Just curious, but it seems a bit strange to hear youth leagues, especially down to third grade, sort of bypassing high school rules, and using NCAA. I'd bet the majority of rec youth leagues, most AAU or travel (competitive) games go by NFHS standards. Heck, round here even the Adult Open Leagues use high school rules (with a few exceptions like 20 minute halfs). This I believe is because a great majority of the pool of officials that can be used in a given area are going to be high school sanctioned and thus more familiar with that level than college. I doubt many college officials are at the local rec center on Sat mornings running with some 4th graders