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The Laws of Duplicate Bridge (also known as the Laws of Duplicate Contract Bridge and the Laws of Contract Bridge) is the official rule book of duplicate bridge promulgated by the World Bridge Federation (WBF). The first Laws of Duplicate Contract Bridge were published in 1928.[1] They were revised in 1933, 1935, 1943, 1949, 1963, 1975, 1987, 1997, 2007 and 2017.[2] The Laws are effective worldwide for all duplicate bridge tournaments sponsored by WBF, zonal, national and subordinate organizations (which includes most bridge clubs).
- ^ The Laws of Contract Bridge: As Agreed Upon and Promulgated by The Whist Club - New York, Portland Club - London, Commission Francaise du Bridge - Paris. Philadelphia, Chicago: John C. Winston Company. 1932. London: Thomas De La Rue & Co. Paris: La Libraire Plon.
- ^ Laws of Duplicate Bridge, World Bridge Federation web site