S.C. Code Ann. § 6-16-70
After the creation of a joint agency, any other governing body may become a member upon:
(c) Approval of such application by resolution of the governing body of each member of such joint agency.
Any member may withdraw from a joint agency by resolution or ordinance of its governing body. All contractual rights acquired and contractual obligations incurred by a member while it was a member shall remain in full force and effect.
Notice of any change in membership shall be filed in the office of the Secretary of State and no change shall be final until such filing.
HISTORY: 1980 Act No. 491, Section 8.