S.C. Code Ann. § 10-1-210: Pay telephone revenue.

Notwithstanding any other provision of law, all state agencies, institutions, colleges, and universities must remit to the general fund all revenues received and all monies retained above the cost of allowing the placement or location of pay telephones on public property. Each state agency, institution, college, and university must annually report to the Executive Budget Office the revenue received for allowing the placement or location of pay telephones on public property, including any commission received for allowing the placement or location of pay telephones on public property. Public property means any and all property occupied or under the control of a state agency, institution, college, or university. The State shall forego any commissions or revenues for the provision of pay telephones in institutions of the Department of Corrections and the Department of Juvenile Justice for use by inmates. The Department of Administration shall ensure that the telephone rates charged by vendors for the use of those telephones must be reduced to reflect this foregone state revenue.