S.C. Code Ann. § 38-71-1330
As used in this article:
(11) "Medical care" means amounts paid for:
(17) "Small employer" means, in connection with a health insurance plan with respect to a calendar year and a plan year, any person, firm, corporation, partnership, association, or employer, as defined in Section 3(5) of the Employee Retirement Income Security Act of 1974, that is actively engaged in business that, on at least fifty percent of its working days during the preceding calendar year, employed no more than fifty eligible employees or employed an average of not more than 50 employees on business days during the preceding calendar year and who employs at least one employee on the first day of the plan year.