S.C. Code Ann. § 62-2-505: Choice of law as to execution.

A written will is valid if:

(a) it is executed in compliance with Section 62-2-502 either at the time of execution or at the date of the testator's death; or

(b) if its execution complies with the law at the time of execution of either (1) the place where the will is executed, or (2) the place where the testator is domiciled at the time of execution or at the time of death.