S.C. Code Ann. § 6-7-1090
From and after the time when the platting jurisdiction of a local planning commission shall have attached by virtue of the adoption by the planning commission of a major street plan and the adoption by the governing authority of land subdivision regulations recommended to them by the planning commission, the governing authority or other public authority shall not accept, lay out, open, improve, grade, pave, or light any street or lay or authorize the laying of any water mains, sewers, connections, or other public facilities or utilities in any street unless such street shall have been accepted or opened as, or shall otherwise have received the legal status of a public street prior to the attachment of the planning commission's subdivision jurisdiction, or unless such street corresponds in its location and lines with a street shown on a subdivision plat approved by the planning commission or on an official map made and adopted by the planning commission. The governing authority may locate and construct or may accept any other street provided that the ordinance or resolution or other measure for such approval be first submitted to the planning commission for its approval or disapproval as provided for in the procedure on plats and upon approval any such street shall have the status of an approved street as fully as though it had been originally shown on a subdivision plat approved by the planning commission or on an official map made and adopted by the planning commission.