The following changes have been made in the basketball rules to go into effect for the season 1956-73 1. A second circle, concentric with the present circle, and having a six-foot radius, is to be drawn at center court. On jump balls at center all players except the jumpers must remain outside this circle until the ball has been tapped. 2. The rule which prohibited substitutes from communicating has been removed. Substitutes must report promptly and play is to be resumed as soon as they have reported, but they may speak to teammates before play is resumed. 3e. Bach team is to be allowed four time-outs (charged) - without penalty, instead of three as formerly. 4, The sections on duties of Scorers and Timekeepers will be rewritten, largely for the purpose of clarification. 5. An interpretation is to be inserted in Rule 15, B, under personal fouls, to the effect that if a player in blocking a shot or in securing the ball from an opponent, strikes the ball and at the same time touches the opponent's hand with. that part of the hand below the wrist joint, no other contact taking place, the contact shall not be considered a foul, but merely incidental to a successful attempt to play the ball. 6. When games are played in quarters, if a foul occurs just ovefore, or simultaneously with the signal ending the first or third quarter, the free throw is to be attempted at the beginning of the next quarter and the rules governing free throws then apply as in any other part of the game. Numerous questions and answers will be inserted to cover special situations that arise under various rulese Issued for the National Basketball Committee of the United States and Canada by Oswald Tower, Editor Andover, Massachusetts, sgune iG, 1956 B. T. Grover, Secretary-Treasurer, National Association Basketball Coaches