In the spirit of the Three Day Member-Guest, what does Rule 30-3C say the penalty is for a player making a stroke at a wrong ball?  Does that player’s partner incur a penalty?

Rule 30-3C:  Match Play  Wrong Ball

Answer:  If a player incurs the loss of hole penalty under Rule 15-3a for making a stroke at a wrong ball, he is disqualified for that hole, but his partner incurs no penalty even if the wrong ball belongs to him.  If the wrong ball belongs to another player, its owner must place a ball on the spot from which the wrong ball was first played.