S.C. Code Ann. § 59-8-170

A student transferring from one public high school to another public high school in grades nine through eleven or from one public middle school to another public middle school in grades six through eight pursuant to this program is not subject to any prohibition by the South Carolina High School League on a transfer student from participating in an interscholastic sport upon transfer. After the initial transfer, any subsequent transfer by a student to another public school shall be subject to the South Carolina High School League eligibility rules.