S.C. Code § 6-29-740
In order to achieve the objectives of the comprehensive plan of the locality and to allow flexibility in development that will result in improved design, character, and quality of new mixed use developments and preserve natural and scenic features of open spaces, the local governing authority may provide for the establishment of planned development districts as amendments to a locally adopted zoning ordinance and official zoning map. The adopted planned development map is the zoning district map for the property. The planned development provisions must encourage innovative site planning for residential, commercial, institutional, and industrial developments within planned development districts. Planned development districts may provide for variations from other ordinances and the regulations of other established zoning districts concerning use, setbacks, lot size, density, bulk, and other requirements to accommodate flexibility in the arrangement of uses for the general purpose of promoting and protecting the public health, safety, and general welfare. Amendments to a planned development district may be authorized by ordinance of the governing authority after recommendation from the planning commission. These amendments constitute zoning ordinance amendments and must follow prescribed procedures for the amendments. The adopted plan may include a method for minor modifications to the site plan or development provisions.
S.C. Code § 6-29-740