APPENDIX K ITF RULES OF TENNIS or not approved, for play. Such ruling may be taken on its own initiative, or  upon application by any party with a bona fide interest therein, including any  player, equipment manufacturer or National Association or members thereof. Such rulings and applications shall be made in accordance with the applicable  Review and Hearing Procedures of the International Tennis Federation. The event organisers must announce in advance of the event: b.  The ball change policy, if any. a.  The number of balls for play (2, 3, 4 or 6). i.  After an agreed odd number of games, in which case, the first ball change  in the match shall take place two games earlier than for the rest of the  match, to make allowance for the warm-up. A tie-break game counts  as one game for the ball change. A ball change shall not take place at  the beginning of a tie-break game. In this case, the ball change shall be  delayed until the beginning of the second game of the next set; or ii.  At the beginning of a set Ball changes, if any, can be made either: If a ball gets broken during play, the point shall be replayed.  Case 1: If a ball is soft at the end of a point, should the point be replayed? Decision: If the ball is soft, not broken, the point shall not be replayed. Note: Any ball to be used in a tournament which is played under the Rules of  Tennis, must be named on the official ITF list of approved balls issued by the  International Tennis Federation. Rackets, which are approved for play under the Rules of Tennis, must comply  with the specifications in Appendix II. The International Tennis Federation shall rule on the question of whether any  racket or prototype complies with Appendix II or is otherwise approved, or not  approved, for play. Such ruling may be undertaken on its own initiative, or  upon application by any party with a bona fide interest therein, including any  player, equipment manufacturer or National Association or members thereof. Such rulings and applications shall be made in accordance with the applicable  Review and Hearing Procedures of the International Tennis Federation. 4.  THE RACKET 447