S.C. Code Ann. § 56-1-660

Upon application for a license to drive, the licensing authority in a party state shall ascertain whether the applicant has ever held, or is the holder of, a license to drive issued by any other party state. The licensing authority in the state where application is made may not issue a license to drive if: (1) The applicant has held a license, but it has been suspended for a violation and the suspension period has not terminated. (2) The applicant has held a license, but it has been revoked for a violation, and the revocation has not terminated, except that after the expiration of one year from the date the license was revoked, the person may make application for a new license if permitted by law. The licensing authority may refuse to issue a license to any applicant if, after investigation, the licensing authority determines that it will not be safe to grant the person the privilege of driving a motor vehicle on the public highways. (3) The applicant is the holder of a license to drive issued by another party state and currently in force unless the applicant surrenders the license.