S.C. Code Ann. § 44-61-100: Exemptions.

The following are exempted from the provisions of this article:

(A) ambulances owned and operated by the Federal Government;

(B) a vehicle or vehicles, including associated personnel, rendering assistance to community ambulances in the case of a catastrophe when licensed ambulances in the locality are insufficient to render the required services;

(C) the use of a privately or publicly owned vehicle, not ordinarily utilized in the transportation of persons who are sick, injured, or otherwise incapacitated and operating pursuant to Section 15-1-310 (Good Samaritan Act) in the prevention of loss of life and alleviation of suffering;

(D) the use of out-of-state ambulance services and personnel to assist with treatment and transport of patients during a disaster or catastrophe when licensed services in the locality are insufficient to render the required services.