S.C. Code Ann. § 34-26-510: Organizations eligible for credit union membership.

Organizations comprised entirely of individuals who are eligible for membership in the credit union may be admitted to membership. Likewise, organizations, one of whose principal functions is to provide services to persons who are eligible for membership in the credit union, may be admitted to membership. Other organizations having a commonality of interest with the credit union may be admitted to membership with the approval of the commissioner.