Rule 4.2 Balls

a. Balls Allowed in Play of Round

  1. Conforming Ball Must Be Played. In making each stroke, a player must use a ball that conforms to the requirements in the Equipment Rules.

    A player may get a conforming ball to play from anyone else, including another player on the course.

  2. Deliberately Altered Ball Must Not Be Played. A player must not make a stroke at a ball whose performance characteristics have been deliberately altered, such as by scuffing or heating the ball or by applying any substance (other than in cleaning it).