The only exceptions are collisions while the runner is sliding at 2nd 3rd or home, and at first base as the runner is crossing the base on the foul side of the bag. A runner can not be called out for running out of the baseline to avoid collision. 7 innings long The batting team generally provides 1st, 3rd and home plate umpires. Making a quick and decisive call will avoid annoying arguments and do-overs. No taking leads, no stealing bases.
Strike zone is approximately knees to armpits high, across the width of the plate.
Any pitch landing on home plate is a ball, no matter how high the arc. This avoids purposeful dropping of the ball by the infielders in order to turn double plays.