Rule 5. The Ball
5-1. General
The ball the player uses shall conform to specifications set forth in Appendix III on maximum weight, minimum size, spherical symmetry, initial velocity and overall distance when tested under specified conditions.
Note:
In laying down the conditions under which a competition is to be played (Rule 33-1), the Committee may stipulate that the ball to be used shall be of certain specifications, provided these specifications are within the limits prescribed by Appendix III, and that it be of a brand and marking as detailed on the current List of Conforming Golf Balls issued by the Royal and Ancient Golf Club of St. Andrews.
5-2. Foreign Material
No foreign material shall be applied to a ball for the purpose of changing its playing characteristics.
PENALTY FOR BREACH OF RULE 5-1 or 5-2:
Disqualification
5-3. Ball Unfit for Play
A ball is unfit for play if it is visibly cut, cracked or out of shape. A ball is not unfit for play solely because mud or other materials adhere to it, its surface is scratched or scraped or its paint is damaged or discolored.
If a player has reason to believe his ball has become unfit for play during the play of the hole being played, he may during the play of such hole lift his ball without penalty to determine whether it is unfit.
Before lifting the ball the player must announce his intention to his opponent in match play or his marker or a fellow-competitor in stroke play and mark the position of the ball. He may then and examine the ball without cleaning it and must give his opponent, marker or fellow- competitor an opportunity to examine the ball.
If he fails to comply with this procedure, he shall incur a penalty of one stroke.If it is determined that the ball has become unfit for play during play of the hole being played, the player may substitute another ball, placing it on the spot where the original ball lay. Otherwise, the original ball shall be replaced.
If a ball breaks into pieces as a result of a stroke, the stroke shall be canceled and the player shall play a ball without penalty as nearly as possible at the spot from which the original ball was played (see Rule 20-5).
*PENALTY FOR BREACH OF RULE 5-3:
Match play - Loss of hole; Stroke play - Two strokes
*If a player incurs the general penalty for breach of Rule 5-3, no additional penalty under theRule shall be applied.
Note:
If the opponent, marker or fellow-competitor wishes to dispute a claim of unfitness, he must do so before the player plays another ball.
(Cleaning ball lifted from putting green or under any other Rule-see Rule 21.)