Section 27906.5 Of Article 8. Signs From California Vehicle Code >> Division 12. >> Chapter 5. >> Article 8.

. Every youth bus, when operated for the transportation of school pupils, shall bear, upon the front and rear of the youth bus, a plainly visible sign containing the words "YOUTH BUS" in letters not less than eight inches in height. The letters on youth bus signs shall be of proportionate width and the letters shall be in sharp contrast to the background.