S.C. Code Ann. § 24-1-145

Notwithstanding any other provisions of law, when any treaty between the United States and a foreign country provides for the transfer or exchange of convicted offenders to the country of which they are citizens or nationals, the Governor, on behalf of this State, shall be authorized, subject to the terms of such treaty, to permit the Director of the Department of Corrections to transfer or exchange offenders and take any other action necessary to participate in such treaty.