South Carolina Code 59-46-20. Ratification of compact after conditions met
(B) When the Governor has executed the compact on behalf of this State, and caused a verified copy to be filed with the Secretary of State, and when the compact has been ratified by ten or more of the compact states, including South Carolina, the compact shall become operative and effective as between this State and the states that have ratified the compact. The Governor shall take action as may be necessary to complete the exchange of official documents between this State and any other state ratifying the compact, and to otherwise carry out the provisions of this chapter.
(C) Upon the compact becoming operative and effective between this State and other states ratifying the compact, it is declared to be the policy of this State to perform and carry out the compact and to accomplish its purposes.