S.C. Code Ann. § 1-1-693

Porgy and Bess is designated as the official opera of this State. The State and any of its agencies, departments, or political subdivisions may not use any copyrighted or proprietary material from Porgy and Bess without the express written permission from the estates of Dubose Heyward, George Gershwin, and Ira Gershwin or the management company responsible for licensing productions of this opera in part or in its entirety.