School Pupil Activity Bus At Royal Coach Tours, we understand the importance and value of school sponsored events such as Grad Nites, Proms, Sporting Events, and Field Trips. To our children these events are lasting memories carried well beyond adult hood, which is why we take the care and provide only the highest level of service for all school bus charters. We are certified When transporting students on school sanctioned events your charter bus provider must have proper certification also known as SPAB (School Pupil Activity Bus) which is regulated by the California Highway Patrol (CHP). The annual SPAB certification inspections are to insure safe charter bus service practices. Royal Coach Tours, for decades has maintained a flawless SPAB track record from the CHP. Safety is not something we understand, it’s our culture.