S.C. Code Ann. § 11-7-60

Each State agency shall remit to the State Auditor an amount representing an equitable portion of the expense of contracting with a certified public accounting firm to conduct a portion of the audit of the State's Comprehensive Annual Financial Report prepared by the Comptroller General's Office. Each state agency's equitable portion of the expense must be determined by a schedule developed by the State Auditor. The remittance must be based upon invoices provided by the State Auditor upon completion of the annual audit. The audit must be rebid using a request for proposals no less frequently than every five years.