The Fed rules are the same, but the states are allowed to add to these rules. This makes it a crap shoot between you knowing each states variances to the rules and how the DOT bears want to interpret them.
Keep in mind what my father said, "if you want to find the real problems in anything, follow the money trail."
They figured out years ago that they can get a load of money from truckers and that has become what determines the rule interpretation.
Are you going to take time off from work or the farm to drive back several states to court to try to reduce the ticket? Likely not and they know that.
Asside from the DOT and CDL issues, if you are involved in an accident, those greedy ambulance chasing lawyers will have everything that you own.