A Guide to the Rules on Clubs and Balls

General

 The ball must not be substantially different from the traditional and customary form and make. The material and construction of the ball must not be contrary to the purpose and intent of the Rules.

Prior to 2008, all of the Rules on the golf ball were precise and quantitative in comparison to the generally more descriptive Rules that relate to clubs. However, in 2008, new language was introduced to protect against any new technology which may be developed in the future which circumvents the intent of the existing Rules. Therefore, along with the specifications listed below, The R&A may conduct additional testing and inspections to identify whether golf balls contain unusual material, construction and/or performance characteristics which might be considered substantially different from the traditional and customary form and make and/or contrary to the purpose and intent of the Rules.