S.C. Code § 31-3-1100
If it is determined at the hearing that the regional authority owns real property in the county seeking to withdraw, such county shall not withdraw from the regional authority. If it is determined that the regional authority has conducted other activities within the boundaries of the county for which it is determined indebtedness is outstanding; or that the regional authority has acquired no real property in the county, but is obligated to perform activities within the county by reason of an executory contract; or that the regional authority is obligated by forms of indebtedness which cannot be identified with its projects at any particular location or locations and which were incurred as a result of activities performed without regard to situs, the county authority may be established with corporate powers provided in Article 7 of this chapter after a finding that the regional authority owns no real property in the county, but the county authority shall have no territorial jurisdiction to operate within the county until it has, by resolution, assumed the county's proportionate share of such indebtedness or such contractual obligation. The county authority's resolution shall also provide for assumption of existing obligations which may be disclosed in the future. The county authority shall assume obligations incurred by the regional authority without regard to situs in the proportion that the population of the county bears to the total population of all of the counties in the regional authority based on the latest United States census, or in case of obligations identifiable with activities conducted within the county, the entire obligation shall be assumed for those activities conducted within the territory of the county.
S.C. Code § 31-3-1100