S.C. Code Ann. § 36-4-303
(1) Any knowledge, notice or stop-order received by, legal process served upon or setoff exercised by a payor bank, whether or not effective under other rules of law to terminate, suspend or modify the bank's right or duty to pay an item or to charge its customer's account for the item, comes too late to so terminate, suspend or modify such right or duty if the knowledge, notice, stop-order or legal process is received or served and a reasonable time for the bank to act thereon expires or the setoff is exercised after the bank has done any of the following:
(2) Subject to the provisions of subsection (1) items may be accepted, paid, certified or charged to the indicated account of its customer in any order convenient to the bank.
PART 4. RELATIONSHIP BETWEEN PAYOR BANK AND ITS CUSTOMER