S.C. Code § 4-9-33
A referendum must be held to approve the creation of a county police department prior to the implementation of an ordinance adopted by a county council which would duplicate or replace the law enforcement functions of a sheriff. As used in this section, the term law enforcement means those activities and duties which require the exercise of custodial arrest authority by a sheriff or his duly appointed and sworn deputy or the performance of duties conferred by state law upon a sheriff and those activities incidental to the performance of law enforcement duties.
Nothing in this section shall be construed as a limitation on the authority of a county council to provide litter control and animal control, to appoint and commission code enforcement officers as provided for in Section 4-9-145, to provide other services not directly related to law enforcement, to exercise the powers conferred by general law upon counties to protect the public health, safety, and general welfare of the community, or to adopt capital and operating budgets for the operation of the county as provided for in Section 4-9-140.
A county council may provide for E-911 services as provided for in Chapter 47 of Title 23; provided, however, that access to criminal records databases and other similar restricted databases relating to law enforcement functions must remain under the supervision of the sheriff or his designee unless law enforcement functions are transferred to a county police department pursuant to a referendum provided for in this section.
S.C. Code § 4-9-33