sentences:  The Waccamaw Siouan tribe gained recognition in 1971 by the North Carolina Commission of Indian Affairs as one of eight state-recognized tribes.The tribe organized as the Waccamaw Siouan Development Association (WSDA), a nonprofit group founded in 1972.The group is headed by a nine-member board of directors, elected by secret ballot in elections open to all enrolled tribal members over the age of 18.