Our local league, 9U, no leadoff, no leaving base until ball is touched or goes past catcher, no U3K, and, thankfully, 5 runs per side at bat limit. Also, we tell the coaches at the pre-game meeting, "strike zone will be generous, but not ridiculous." Helps make the games go along much better. At 10U, full on baseball rules. It's always fun, though, to watch the circus come to town on the uncaught 3K when 1B is occupied with less than 2 outs. Actually, it's hysterical from my point of view!