S.C. Code Ann. § 49-28-70
(A) A copy of the joint ordinance creating the commission and of a joint ordinance amending or repealing the joint ordinance creating the commission must be filed with the director of the department. When the director receives substantially identical ordinances from all three of the counties in accordance with procedures agreed upon, he shall certify this fact and distribute, within ten days, a certified single ordinance text to the following: