S.C. Code Regs. § § 81-12
A person who, having voluntarily surrendered his license, registration or certification has been thereafter reinstated in the manner hereinafter provided, or who, having been suspended for an indefinite period, has been thereafter reinstated in the manner hereinafter provided, shall have his license, registration or certification revoked upon being found guilty of subsequent misconduct which would warrant a suspension of at least one year.
Whenever a license, registration or certification is suspended or any other action "short of revocation or suspension" is taken, the Board may require the licensee, registrant or holder of a certificate to give evidence of satisfactory compliance therewith before reinstating his license, registration or certification.
S.C. Code Regs. § 81-12