S.C. Code § 51-17-120
Nothing contained in this chapter shall be construed as interfering with the purposes stated in the establishment of or pertaining to any state or local park, preserve, wildlife refuge, forest or other area or the proper management and development thereof, except that any agency managing an area or feature acquired as a Heritage Preserve or a Heritage Site under the provisions of this chapter shall preserve it in accordance with the applicable conveyance, registration agreement and the rules and regulations of the board of the department applicable thereto.
Neither the acquisition of any Heritage Preserve nor the registration of any Heritage Site nor any action taken by the board of the department under any of the provisions of this chapter shall void or replace any protective status under law which an area would have were it not a Heritage Preserve or Heritage Site, the protective provisions of this chapter being supplemental thereto.
S.C. Code § 51-17-120