S.C. Code § 11-35-3023
In accordance with this section, the applicable section of Article 5, and procedures published by the State Engineer, a governmental body may limit participation in a solicitation for construction to only those businesses, including potential subcontractors, that are prequalified. The prequalification process may be used only with the approval and supervision of the State Engineer's Office. If fewer than two businesses are prequalified, the prequalification process must be canceled.
S.C. Code § 11-35-3023
2008 Act No. 174, Section 21, provides as follows:
"This act takes effect upon approval by the Governor and applies to solicitations issued on or after January 1, 2008."
2019 Act No. 41, Section 80, provides as follows:
"SECTION 80. This act takes effect upon approval by the Governor and applies to solicitations issued after that date."