29-1. General
In a threesome or a foursome, during any stipulated round the
partners must play alternately from the teeing grounds and
alternately during the play of each hole. Penalty strokes do not
affect the order of play.

29-2. Match Play
If a player plays when his partner should have played, his side
loses the hole.

29-3. Stroke Play
If the partners make a stroke or strokes in incorrect order, such
stroke or strokes are cancelled and the side incurs a penalty of
two strokes. The side must correct the error by playing a ball
in correct order as nearly as possible at the spot from which it
first played in incorrect order (see Rule 20-5). If the side makes
a stroke on the next teeing ground without first correcting the
error or, in the case of the last hole of the round, leaves the
putting green without declaring its intention to correct the
error, the side is disqualified