The Buddhist flag is a modern creation it was jointly designed by Mr J.R. de Silva and Colonel Henry S. Olcott to mark the revival of Buddhism in Ceylon in 1880. It was accepted as the International Buddhist Flag by the 1952 World Buddhist Congress.
The OP seems to be asking if an ambulance if it otherwise obeys every traffic law can be cited if their ONLY offense is speeding. More specifically it seems to be saying they are only allowed to exceed the speed limit by 10 mph. At least according to Michigan, Washington and Arizona the answer to this is no.
How fast do rally cars go? It depends on which part of the event we're talking about. Let's answer the boring part of it first. On the transits, which are the open, public, normal roads between the racing sections, the cars and motorcycles go just as fast as everyone else on the road. They're bound by the same speed limits as everyone else is, and can be pulled over for speeding just like any other vehicle on the road.