S.C. Code Ann. § 6-7-1040
From and after the time the local planning commission shall have prepared and adopted a comprehensive plan or at least the major street portion of such comprehensive plan and shall have recommended to the governing authority of the municipality or the governing authority of the county regulations for the subdivision of land within the municipality or county, respectively, which regulations shall have been adopted by the governing authority of the city or county, then no plat of a subdivision within the municipality or within the unincorporated portion of the county shall be filed or recorded in the office of the county where deeds are required to be recorded until it shall have been submitted to and approved by the planning commission and such approval entered in writing on the plat, by the secretary of the planning commission. The filing or recording of a plat of a subdivision without the approval of the planning commission as required by this chapter is hereby declared a misdemeanor and, upon conviction, is punishable as provided by law.