S.C. Code Ann. § 60-9-20

The funds provided under Section 60-9-10 shall be expended only for the establishment of a library, for the enlargement of a library or for the purchase of supplementary readers to be kept in the school library. Any free public school may participate in this fund but only once during a fiscal year. The trustees or teachers of any school receiving the benefits of this section and Section 60-9-10 shall file, both with the county superintendent of education and with the State Superintendent of Education, a correct and legible list of the books purchased.