They haven't. I was read the riot act once and could see the state line sign, which made it worse. 

My trailer is 24' and old, but everything is good working order. I wasn't close to being loaded, one cow and two weaned calves, which I was basically accused of stealing until I provided the bill of sale. He finally settled with lecturing me over and over again about being "just like a semi", but "he was going to let me go this time". I called the office when I got home and couldn't get anyone to give me what felt like a confident answer. Whatever the law is, I just need to know what it is.

I also no longer volunteer to bring other peoples calves to my place to save them some driving when attending production sales up there. I have no doubt they would nail me for commercial hauling and it would open the door to numerous other violations.