S.C. Code § 59-20-23
When an appeal of the assessed value of property assessed pursuant to Section 12-43-220(a) extends for more than two years and the amount in dispute is more than thirty percent of the total of assessed value of property in the school district in which the property under appeal is located, the index of taxpaying ability for the school district must be calculated using the value asserted by the taxpayer in the appeal.
If the final settlement of the appeal provides for an assessed value greater than the value asserted in the taxpayer's appeal, the local school district, within twelve months, must remit to the general fund of the State any additional funds received from the State Department of Education due to the utilization of the value of the facility asserted in the taxpayer's appeal.
Any funds remitted to the general fund of the State pursuant to this section are considered current fiscal year funds appropriated under the Education Finance Act and must be included in the next distribution of such funds to school districts.
S.C. Code § 59-20-23