I got pulled over by a state boy on the way back from the dealer with my 61" ztr and 44" walk behind on my trailer. I was pulled over because i didnt have any DOT identificatioin on my truck. Supposedly any truck and trailer over 10,000# requires a DOT registration. They go by what the truck and trailer is rated for. My truck is rated at 6000# and the trailer at 6840#. All trucks must also be inspected once a year by a certified DOT inspector, and all operators must have a DOT medical card. They have to have a physical done to make sure they are capible of driving it. All said and done, i recieved two citations and 5 warning. One for no DOT registration- $215, and no seat belt- $25. Got warned for no medical card, no annual inspection on truck or trailer, and no fire extinguisher. This is just a warning to all of you out there because this is federal regulations, not state by state.