S.C. Code Ann. § 20-1-250: Applicants under age of consent; consent of relative or guardian.

A marriage license must not be issued when either applicant is under the age of sixteen. When either applicant is between the ages of sixteen to eighteen and that applicant resides with father, mother, other relative, or guardian, the probate judge or other officer authorized to issue marriage licenses shall not issue a license for the marriage until furnished with a sworn affidavit signed by the father, mother, other relative, or guardian giving consent to the marriage.