need to use new conforming wedges (those without square grooves). Moreover, those who plan to qualify for any other USGA championship (Amateur championships—under 18, Amateur, over 25, and over 50 in both sexes, and four-ball, along with international team championships), will need new conforming wedges by 2014. In addition, this regulation includes IGF and USGA-sanctioned regional amateur events as well, as a "condition of competition". Wedges that conform to the new standard are often marketed as "CC" or "Condition of Competition" wedges; this moniker is likely to fall into disuse as players upgrade clubs and the use of non-conforming irons diminishes. See also Golf glossary Golf cart Obsolete golf clubs Solar Golf Cart References Notes Bibliography Bade, Edwin. The Mechanics of Sport. A. G. Elliot, New York, 1952. Bruce, Ben and Evelyn Davies. Beginning Golf. Wadsworth Publishing, California, 1962. Cheatum, Billy Ann. Golf. W. B. Saunders Company, Philadelphia, 1969. Cochran, A.J. Science and Golf II: Procedures of World Scientific Congress of Golf. M. R. Farally, London, 1994. Concannon, Dale. The Original Rules of Golf. Bodleian Library, Oxford, 2009. Cook, Kevin. Driven: Teen phenoms, Mad Parents, Swing Science and the Future of Golf. Gotham Books, New York, 2008. Evans, Webster. Encyclopaedia of Golf. St. Martins Press, New York, 1971. Ford, Doug. Getting Started in Golf. Sterling Publishers, New York, 1964. Gibson, Kevin H. The Encyclopedia of Golf. A. S. Barnes, New York, 1958. External links How Zip Is Put Into Your Golf Clubs—detailed and well illustrated July 1951 Popular Science article on the manufacturing process for golf clubs