S.C. Code Ann. § 36-9-409
(a) A term in a letter of credit or a rule of law, statute, regulation, custom, or practice applicable to the letter of credit which prohibits, restricts, or requires the consent of an applicant, issuer, or nominated person to a beneficiary's assignment of or creation of a security interest in a letter-of-credit right is ineffective to the extent that the term or rule of law, statute, regulation, custom, or practice:
(b) To the extent that a term in a letter of credit is ineffective under subsection (a) but would be effective under law other than this chapter or a custom or practice applicable to the letter of credit, to the transfer of a right to draw or otherwise demand performance under the letter of credit, or to the assignment of a right to proceeds of the letter of credit, the creation, attachment, or perfection of a security interest in the letter-of-credit right:
(3) does not require the applicant, issuer, nominated person, or transferee beneficiary to recognize the security interest, pay or render performance to the secured party, or accept payment or other performance from the secured party.
PART 5. FILING
SUBPART 1. FILING OFFICE; CONTENTS AND EFFECTIVENESS OF FINANCING STATEMENT