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Rules and Decisions

Prestented by ROLEX

The USGA, in conjunction with The R&A in St. Andrews, Scotland, writes, interprets and maintains the Rules of Golf to guard the tradition and integrity of the game. The two organizations are joint authors and owners of The Rules of Golf and Decisions on the Rules of Golf. Through an agreement with The R&A, the Rules jurisdiction of the USGA includes only the United States, its possessions and Mexico. The latest version went into effect Jan. 1, 2008, with the next revision taking effect Jan. 1, 2012.

Additional Rules Notifications

 

 

 

 

 

 

 

Browse the Rules

Section I

Etiquette

Section II

Definitions

Section III

The Game

Rule 1

The Game

Rule 2

Match Play

Rule 3

Stroke Play

Clubs and the Ball

Rule 4

Clubs

Rule 5

The Ball

Player's Responsibilities

Rule 6

The Player

Rule 7

Practice

Rule 8

Advice; Indicating Line of Play

Rule 9

Information as to Strokes Taken

Order of Play

Rule 10

Order of Play

Teeing Ground

Rule 11

Teeing Ground

Playing the Ball

Rule 12

Searching for and Identifying Ball

Rule 13

Ball Played as It Lies

Rule 14

Striking the Ball

Rule 15

Substituted Ball; Wrong Ball

The Putting Green

Rule 16

The Putting Green

Rule 17

The Flagstick

Ball Moved, Deflected or Stopped

Rule 18

Ball at Rest Moved

Rule 19

Ball in Motion Deflected or Stopped

Relief Situations and Procedure

Rule 20

Lifting, Dropping and Placing; Playing from Wrong Place

Rule 21

Cleaning Ball

Rule 22

Ball Assisting or Interfering with Play

Rule 23

Loose Impediments

Rule 24

Obstructions

Rule 25

Abnormal Ground Conditions, Embedded Ball and Wrong Putting Green

Rule 26

Water Hazards (Including Lateral Water Hazards)

Rule 27

Ball Lost or Out of Bounds; Provisional Ball

Rule 28

Ball Unplayable

Other Forms of Play

Rule 29

Threesomes and Foursomes

Rule 30

Three-Ball, Best-Ball and Four-Ball Match Play

Rule 31

Four-Ball Stroke Play

Rule 32

Bogey, Par and Stableford Competitions

Administration

Rule 33

The Committee

Rule 34

Disputes and Decisions

Appendices

Appendix I

Local Rules; Conditions of the Competition

Appendix II

Design of Clubs

Appendix III

The Ball

Rules of Amateur Status

Policy on Gambling

Miscellaneous Decisions

Decisions Applicable Only In The USGA's Rules Jurisdiction

Rule 15. Substituted Ball; Wrong Ball
Definitions

All defined terms are in italics and are listed alphabetically in the Definitions section.

15-1. General

A player must hole out with the ball played from the teeing ground unless the ball is lost or out of bounds or the player substitutes another ball, whether or not substitution is permitted (see 15-2). If a player plays a wrong ball, see Rule 15-3.

15-2. Substituted Ball

A player may substitute a ball when proceeding under a Rule that permits the player to play, drop or place another ball in completing the play of a hole. The substituted ball becomes the ball in play.

If a player substitutes a ball when not permitted to do so under the Rules, that substituted ball is not a wrong ball; it becomes the ball in play. If the mistake is not corrected as provided in Rule 20-6 and the player makes a stroke at a wrongly substituted ball,he loses the hole in match play or incurs a penalty of two strokes in stroke play under the applicable Rule and, in stroke play, must play out the hole with the substituted ball.

Exception: If a player incurs a penalty for making a stroke from a wrong place, there is no additional penalty for substituting a ball when not permitted.

(Playing from wrong place - see Rule 20-7.)

15-3. Wrong Ball

a. Match Play

If a player makes a stroke at a wrong ball, he loses the hole.

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.

If the player and opponent exchange balls during the play of a hole, the first to make a stroke at a wrong ballloses the hole; when this cannot be determined, the hole must be played out with the balls exchanged.

Exception: There is no penalty if a player makes a stroke at a wrong ball that is moving in water in a water hazard. Any strokes made at a wrong ball moving in water in a water hazard do not count in the player's score. The player must correct his mistake by playing the correct ball or by proceeding under the Rules.

b. Stroke Play

If a competitor makes a stroke or strokes at a wrong ball, he incurs a penalty of two strokes.

The competitor must correct his mistake by playing the correct ball or by proceeding under the Rules. If he fails to correct his mistake before making a stroke on the next teeing ground or, in the case of the last hole of the round, fails to declare his intention to correct his mistake before leaving the putting green,he is disqualified.

strokes made by a competitor with a wrong ball do not count in his score. If the wrong ball belongs to another competitor, its owner must place a ball on the spot from which the wrong ball was first played.

Exception: There is no penalty if a competitor makes a stroke at a wrong ball that is moving in water in a water hazard. Any strokes made at a wrong ball moving in water in a water hazard do not count in the competitor's score.

(Lie of ball to be placed or replaced altered - see Rule 20-3b.)
(Spot not determinable - see Rule 20-3c.)

Rules

Decisions