S.C. Code Ann. § 55-9-210: Finances.

The local public authorities having power to appropriate monies within the counties, municipalities or other political subdivisions of this State acquiring, establishing, developing, operating, maintaining or controlling airports under the provisions of this chapter may appropriate and cause to be raised by taxation or otherwise in such political subdivisions. All monies derived from these airports must be obligated to these facilities. A diversion of revenue away from airport facility accounts for nonaeronautical purposes is unlawful and may subject an airport or airport sponsor to denial of future funding.