S.C. Code Ann. § 8-7-80

An officer who shall be absent from his office or position in the military service shall not be entitled to any compensation as such officer during such absence, but upon his return, if he return before the expiration of the term for which he was elected or appointed, after thirty days' notice, in writing, he shall be entitled to possession of the office or position from which he was absent and upon reassuming the duties of the office to receive the compensation for the remainder of the term to which the holder thereof is entitled.