S.C. Code Ann. § 59-67-40: Applicability of laws and regulations to private school buses.

All school buses owned and operated by a private school or operated under contract for a private school must conform to State laws and regulations of the State Board of Education with respect to painting, lettering on the front and rear of the bus, use of stop arm and warning lights for loading and unloading pupils on the highway, maximum speeds and stopping at railroad crossings.

Buses not complying with these requirements shall be painted a color other than yellow and shall not be entitled to the privileges and protection of a school bus operating on the highways of this State.