The 26,001 threshold is not absolute. It also depends on the trailer, if it is plated for more than 10,000#'s, or if it is deemed by the officer that it is capable of carrying more than that, even though it is shopbuilt/homemade, it will require a CDL in most states. Also, if the truck has air brakes, and some do, even though they are under the 26,001#rating, still require CDL's. This whole thing is complicated even further by the fact that most all vehicles fall under DOT regs irregardless of their size. Fed Mtr. regs, which is a different set of rules, can also come into play. Commerce, interstate, intrastate, etc. This can get very complicated very fast. And, it's further compounded by the fact that different states have different regs. Hang on, theres more. The "kind officer" who stops you has HIS version of interpretation of the regs and it usually doesn't match your version or even the next officer. Now, don't forget that some states DOT has offered training courses to local police, deputies, state patrol, etc. in inspecting trucks and trailers. This allows the DOT to increase their numbers without increasing payroll. Most of those guys don't know a kingpin from a bowling pin, but they can make your life a miserable hell, in time, aggravation and monetary expense. All of this and the threat of impounding your truck/trailer and yes they can, or, put the old sticker on it and place it "out of service". Now there's some good news!. Be prepared, as you continue your research, to ask 50 people and get 50 DIFFERENT answers. About all you can do is, maintain your truck and trailer in proper condition, use certified chain, hooks and binders. Forget the Chinese stuff. Past that, it's just a roll of the dice. Thanks, John