22. Whatever happens by accident to a ball in motion, such as its being deflected or stopped by any agency outside the match, or by the fore-caddie, is a "rub of the green," and the ball shall be played from where it lies. Should a ball lodge in anything moving, such ball, or, if it cannot be recovered, another ball, shall be dropped as nearly as possible at the spot where the object was when the ball lodged in it. But if a ball at rest be displaced by any agency outside the match, the player shall drop it or another ball as nearly as possible at the spot where it lay. On the putting-green the ball may be replaced by hand.

23. If the player's ball strike, or be accidentally moved by, an opponent or an opponent's caddie or clubs, the opponent loses the hole.

24. If the player's ball strike, or be stopped by, himself or partner, or either of their caddies or clubs, or if, while in the act of playing, the player strike the ball twice, his side loses the hole.

25. If the player, when not making a stroke, or his partner or either of their caddies touch their side's ball, except at the tee, so as to move it, or by touching anything cause it to move, the penalty is one stroke.

26. A ball is considered to have been moved if it leave its original position in the least degree and stop in another; but if a player touch his ball and thereby cause it to oscillate, without causing it to leave its original position, it is not moved in the sense of Rule 25.

27. A player's side loses a stroke if he play the opponent's ball, unless (l) the opponent then play the player's ball, whereby the penalty is cancelled, and the hole must be played out with the balls thus exchanged; or (2) the mistake occur through wrong information given by the opponent, in which case the mistake, if discovered before the opponent has played, must be rectified by placing a ball as nearly as possible where the opponent's ball lay.

If it be discovered before either side has struck off at the tee that one side has played out the previous hole with the ball of a party not engaged in the match, that side loses that hole.

28. If a ball be lost, the player's side loses the hole. A ball shall be held as lost if it be not found within five minutes after the search is begun.

29. A ball must be played wherever it lies, or the hole be given up, except as otherwise provided for in the rules.