S.C. Code Ann. § 34-25-270: Applicable law.

(a) An out-of-state state bank which establishes and maintains one or more branches in South Carolina under this article may conduct any activities at such branch or branches that are authorized under the laws of this State for South Carolina state banks.

(b) A South Carolina state bank may conduct any activities at any branch outside South Carolina that are permissible for a bank chartered by the host state where the branch is located.

(c) An out-of-state bank that has established or acquired a branch in South Carolina under this article may establish or acquire additional branches in South Carolina to the same extent that any South Carolina bank may establish or acquire a branch in South Carolina under state law.