Somebody I know was towing a trailer in the state of colorado with expired plates and got cited for it under 42-3-114 CRS The ticket was written with the vehicle's License plate number listed on it which was valid and the plate number for the trailer that was expired was never put on the ticket. I read into the statute above and it specifies a motor vehicle, Last I checked, trailers don't have motors powering them. In this situation, is the trailer considered a motor vehicle, and is there any defense for them in court against the charge?