A driver is required to have a tank endorsement in the event that he is hauling tanks or totes with a rated capacity of 119 gallons or more, and an aggregate rated capacity of 1,000 or more, that is permanently or temporarily attached to the vehicle. However, tank endorsements are not required for commercial vehicles that transport empty storage container tanks (not designed for transportation) - commercial motor vehicles with a rated capacity of 1000 or more that is temporarily attached to a flatbed trailer are not considered tank vehicles.