S.C. Code Ann. § 4-37-60

Notwithstanding Sections 4-10-310 and 4-37-40, or any other provision of law, a county which has imposed by ordinance a sales and use tax in an amount not to exceed one percent within its jurisdiction pursuant to this chapter may utilize the provisions of Article 3, Chapter 10, Title 4 to impose an additional sales and use tax in an amount not to exceed one percent within its jurisdiction.