I love discussions like this, where everyone thinks they are right because they are going by what they have heard, what is available online , what is allowed in their state, and what they have gotten away with.
   In my 4.5 million miles of commercial work, and several hundred thousand miles of personal hauling, there is one thing that you can count on, and that is whatever loophole you have found, someone has enacted a law to cover it.
   A former boss had a requirement of us, NEVER argue with the DOT! If you argued, it only made it worse! You can't tell him how to do his job, you can't know how many more tickets he has to write before he reaches his quota for the current timeframe.
  Hay Dude, in order to get that clean DOT Inspection, I would be willing to bet that you were polite, answered the questions the officer asked, provided the paperwork he asked for and gave the impression that you knew what you were doing and how you were supposed to do it! Most of the time they are just doing a job, like you are, and aren't looking for a fight. Give them one and you won't be the winner! Right?
   I can tell stories about what DOT officers have done that will make most people cringe, and most of the time when it happens to me, I just accept it and figure I got by with enough things that getting cited for whatever they are nailing me for was way less than I deserved. As a driver, you have to be on your toes and know what they are looking for, and have the answers already figured out before they ask the question!
   David from jax