The NWA World Tag Team Championship is a professional wrestling world tag team championship created by the National Wrestling Alliance. From 1948 to 1982, the NWA allowed member promotions to create their own territorial version of the "NWA World Tag Team Championship" without oversight from the board of directors. The first of these NWA World Tag Team Championships was created in 1950 in the San Francisco territory, which while billed as a "World" title was essentially restricted to the specific NWA territory. In 1957 as many as 13 versions of the NWA World Tag Team Championship were confirmed to be in existence. In 1982 Big Time Wrestling, based in Los Angeles, closed and abandoned their version of the championship. This meant that only the Jim Crockett Promotions' NWA World Tag Team Championship was active, but still being controlled by JCP, not the NWA board of directors. In 1991 that championship was renamed the WCW World Tag Team Championship.