anything over 26k needs to have cdl w/log. it goes by whats on your door and trailer combined weight possible not what you actually weigh.
if under 26k and using it for commercial purposes your still only allowed 12 hours per day work wise, and no more then 70 in a 7 day work week (double check days vs hours)
also your supposed to be enrolled in a drug/alky program with random drug testing if over 26k
there are also some variations depending if you do it for your own business or hauling for someone else, how far you can go as far as air miles etc etc.
if over 12k your suppose to carry a medical card
also your "techinically" suppose to stop at all scales if over 10k
if your hauling vehicles you need a mc190 form with your insurance
most likely you will get caught eventually, were a bit biased and bitter considering all of these sister fisting half ass operations run beat up shoddy equipment up and down the highway and hardly ever get pulled and when they do they play the "i didnt know" card. everything I own is top notch at all times & we have been hammered by PA, DE & MD, they straight up told us if they want to find something they can at any time. also if you do get caught over 26k towing capacity they will park you and make someone with a valid cdl come take the truck and trailer for you, or tow you. Or make you unhook and have someone else come pick it up, assuming you have a medical card.
everything above is all facts, thanks to our DOT audit we had the other year, clearly the audit was not by choice and they acted like total pricks. But at the end of the day its easier to comply then try to weasel your way around it.