Procedure for cross country movement of the vehicle, you should obtain NOC from the RTO with whom your vehicle is registered. With the NOC and the C Book, you should approach the RTO of the place where you now recide to get the vehicle transferred to that place. It involves some procedure and fee payable. However, 99% do not much bother to do this. Only RTO Officials can question your running a vehicle registered in one state in another state. However, Police normally harrass the vehicle owner as it is evident for them its an out of state vehicle.