S.C. Code § 56-5-6310
The provisions of Chapters 1, 3, 5, 7, 9, and 10 of Title 56 shall be applicable to private roads if the owner, including any corporation or homeowners' association holding title to community roads and excluding those only holding easements over such roads, shall file a written consent stating that the undersigned is the owner of the private roads shown on an attached plat and consents to the application of the provisions of this chapter for purposes of highway safety on such private roads. When the road is owned by two abutting owners, both shall consent to the application of this chapter. In the event there are more than two owners of the road, the provisions of this chapter shall apply when a majority of those owners of the total front footage abutting such road shall consent thereto. The consent shall be executed with the same formalities as a deed and with the plat shall be filed with the clerk of court or register of deeds for the county in which the private road is located and with the sheriff of such county. No derivation clause shall be required. Such filing shall not constitute a dedication to the public of such roads nor shall it constitute permission by the owner for the public to use such roads. The written consent shall become effective thirty days from the date it is filed with the clerk of court or register of deeds.
S.C. Code § 56-5-6310