The whole CDL thing has become a nightmare. 99 percent of the cops who will pull you are are clueless about the law. The DMV do not have a clue about what you need to drive your truck around, specialy if your in any way involved in comercial fraight hauling. Go to the DOT, the local scale, or simular, do not trust the cops, do not trust a judge, do not trust the DMV, thay do not know the law. A couple things, the anacranims can drive you nots, IFTA is International fuel tax agrement, something like that. DOT is Department of Transportation, errr can't remember all the rest of them, its been a while sense I drove a truck. Anyways, the best thing you can do is contact the DOT directly and find out the law. GET IT IN WRITING! Make copys, and carry thoes copys with you every time you move that truck. As for scales, pretty much so, if your running a comercial, of any sort, you have to cross the scales. Depending on state, some of them are much much worse than others. You can zip past the scales if your under a certian waight, or if you do not have a trailer, but, got a trailer, your going to want to pull in. YOu will want to get a copy of the DOT rules, and learn them, and mark the relivant pasages, as some cops will pull you over and ticket you for things that you are quite legal on. Some states are quite intent on raping people for any money thay can get.