Raritan Valley National Adult Baseball Association: Safety

Courtesy Runner Rule
Two players per team may be designated as non-runners. When they reach base the manager has the option of letting a courtesy runner run for them. THis option must be exercised immediately following the play on which they reached base or not at all. A courtesy runner must be the last RECORDED out (unless the last recorded out is the second non-runner.) This is not pinch running and has no effect on the batting order.

No Collision Rule
A runner must either slide or attempt to go around a fielder who is in possession of the ball or who in the umpire's judgement is about to receive the ball. A runner who, in the umpire's judgement, collides with a fielder in an attempt to jar the ball loose or injure the player will be called out and ejected.