S.C. Code Ann. § 59-19-30
The original trustees having been appointed for terms of one, two and three years, respectively, the county boards of education shall, during the first week of April in each year, appoint one trustee for each district from the qualified electors and taxpayers residing in the district for which the appointment is made to succeed the trustee whose term expires during that year and to serve with the holdover members until his successor has been appointed and qualified.
SECTION 59-19-30 not to repeal, supersede, or annul any special act providing for appointment or election, see SECTION 59-19-40.
SECTION 59-19-40. Appointment of members; special provisions shall not be superseded by Section 59-19-30.
The provisions of Section 59-19-30 shall neither repeal, supersede nor annul any special act providing for the appointment or election of school trustees in any school district or in any of the several counties of the State.