APPENDIX III.

Any design in a club or ball which is not covered by Rules 4 and 5 and Appendices II and III,or which might significantly change the nature of the game,will be ruled on by the Royal and Ancient Golf club of St.Andrews. The dimensions contained in Appendices II and III are referenced in imperial measurements.A metric conversion is also referenced for information,calculated using a conversion rate of 1 inch =25.4 mm.In the event of any dispute over the conformity of a club or ball,the imperial measurement shall take precedenc

The Ball

Weight

The weight of the ball shall not be greater than 1.620 ounces avoirdupois (45.93 gm).

Size

The diameter of the ball shall be not less than 1.680 inches (42.67mm).This specification will be satisfied if,nder its own weight,a ball falls through a 1.680 inches diameter ring gauge in fewer than 25 out of 100 randomly selected positions,the test being carried out at a temperature of 23 ± 1 °

Spherical Symmetry

The ball is not be designed,manufactured or intentionally modified to have properties which differ from those of a spherically symmetrical ball.

4.Initial Velocity

The initial velocity of the ball shall not exceed the limit specified (test on file)when measured on apparatus approved by the Royal and Ancient Golf club of St. Andrews.

5.Overall Distance Standard

The combined carry and roll of the ball,when tested on apparatus approved by the Royal and Ancient Golf club of St.Andrews,shall not exceed the distance specified under the conditions set forth in the Overall Distance Standard for golf balls on file with the Royal and Ancient Golf Club of St.Andrews.