S.C. Code Ann. § 59-67-30: Painting and markings of school buses.

Every State-owned school bus while being used in the transportation of school pupils shall be substantially painted with high visibility yellow paint, conforming and similar to National School Bus chrome yellow, and shall display the following markings:

(1) Sides - The words "SOUTH CAROLINA PUBLIC SCHOOLS" in not less than four inch high letters located directly under the windows.

(2) Back - The words "SCHOOL BUS" in letters not less than eight inches high located between the warning signal lamps.

(3) Front - The words "SCHOOL BUS" in letters not less than eight inches high located between the warning signal lamps.

The State Board of Education is hereby authorized to adopt and to enforce whatever additional regulations regarding the painting and marking of school buses which they may deem necessary and proper.