Worked a boys team camp this afternoon, and one of the coaches is a Michigan registered official.
After almost every call we made, when his players got that puzzled look of, "Wha?!!??", he explained the call with one exception..., when we adjusted the 4+2 for free throws, and his players said "Wha?", he explained that it's a new rule that he didn''t know yet.
... Kinda different.