S.C. Code Ann. § 36-9-316
(a) A security interest perfected pursuant to the law of the jurisdiction designated in Section 36-9-301(1) or 36-9-305(c) remains perfected until the earliest of:
(c) A possessory security interest in collateral, other than goods covered by a certificate of title and as-extracted collateral consisting of goods, remains continuously perfected if:
(e) A security interest described in subsection (d) becomes unperfected as against a purchaser of the goods for value and is deemed never to have been perfected as against a purchaser of the goods for value if the applicable requirements for perfection under Section 36-9-311(b) or 36-9-313 are not satisfied before the earlier of:
(f) A security interest in deposit accounts, letter-of-credit rights, or investment property which is perfected under the law of the bank's jurisdiction, the issuer's jurisdiction, a nominated person's jurisdiction, the securities intermediary's jurisdiction, or the commodity intermediary's jurisdiction, as applicable, remains perfected until the earlier of:
(g) If a security interest described in subsection (f) becomes perfected under the law of the other jurisdiction before the earlier of the time or the end of the period described in that subsection, it remains perfected thereafter. If the security interest does not become perfected under the law of the other jurisdiction before the earlier of that time or the end of that period, it becomes unperfected and is deemed never to have been perfected as against a purchaser of the collateral for value.
SUBPART 3. PRIORITY