There’s been some discussion on one of the yahoo Morgan groups about this lately and since many people who visit here are transporting horses on a regular basis I thought I should post this info. I don’t even own a truck and trailer, so I haven’t looked through all the regulations, but apparently there are some new laws within the last few years that affect anyone transporting over 10K pounds, particularly if you’re crossing state lines. Laws seem to vary from state to state, so make sure you’re in compliance with all states you’ll be passing through. Here are a few helpful links.
General Info: http://www.qhorses.com/dot.htm
FMCSA: http://www.fmcsa.dot.gov/ <- About halfway down the page in the middle click on “Step-by-Step Help with the Registration Process” to see if this applies to you.