S.C. Code Ann. § 5-3-310

When all or part of the area of a special purpose district as defined in Section 6-11-1610 or a special taxing district created pursuant to Section 4-9-30 or Section 4-19-10, et seq. or an assessment district created pursuant to Chapter 15 of Title 6, or any other special purpose district or special taxing or assessment district is annexed into a municipality under the provisions of Section 5-3-150 or 5-3-300, the following provisions apply: (1) At the time of annexation or at any time thereafter the municipality may elect at its sole option to provide the service formerly provided by the district within the annexed area. The transfer of service rights must be made pursuant to a plan formulated under the provisions of Sections 5-3-300 through 5-3-315. (2) Until the municipality upon reasonable written notice elects to displace the district's service, the district must be allowed to continue providing service within the district's annexed area. (3) Annexation does not divest the district of any property; however, subject to the provisions of item (4) below, real or tangible personal property located within the area annexed must be transferred to the municipality pursuant to a plan formulated under the provisions of Sections 5-3-300 through 5-3-315. (4) In any case in which the municipality annexes less than the total service area of the district, the district may, at its sole discretion, retain ownership and control of any asset, within or without the annexed area, used by or intended to be used by residents within the district's unannexed area or used or intended to be used to provide service to residents in the unannexed area of the district. (5) Upon annexation of less than the total area of the district, the district's boundaries must be modified, if at all, by the plan formulated pursuant to the provisions of Sections 5-3-300 through 5-3-315. The plan must specify the new boundaries of the district.