No ordinances or regulations enacted under items (4), (5), (6), (7), (9) or (10) of Section 56-5-710 shall be effective until signs giving notice of such local traffic regulations are posted upon or at the entrances to the highway or part thereof affected as may be most appropriate.
Notice of local regulations required
S.C. Code Ann. § 56-5-720, under Title 56, Chapter 5.
S.C. Code Ann. § 56-5-720