S.C. Code Ann. § 39-5-540

If the first run exhibitors within any county in this State desire to waive the provisions of this article for the purpose of blind bidding on a movie to be shown within that county, the exhibitors may waive the provisions and blind bid if all exhibitors within that county who exhibit first run movies agree in writing to such waiver; and the distributors shall have the right to request waivers from any and all first run exhibitors.