S.C. Code Ann. § 36-9-509
(a) A person may file an initial financing statement, amendment that adds collateral covered by a financing statement, or amendment that adds a debtor to a financing statement only if:
(b) By authenticating or becoming bound as debtor by a security agreement, a debtor or new debtor authorizes the filing of an initial financing statement, and an amendment, covering:
(d) A person may file an amendment other than an amendment that adds collateral covered by a financing statement or an amendment that adds a debtor to a financing statement only if: