I hope this is helpful:
https://www.fmcsa.dot.gov/faq/what-%E2%80%9Ccovered-farm-vehicle%E2%80%9D-cfv
Please note that last paragraph.
Here are broader definitions:
https://www.fmcsa.dot.gov/regulations/title49/section/390.5
Edited to add a link which ties that definition into hours-of-service regs (last paragraph on that page):
https://www.fmcsa.dot.gov/regulations/title49/part/395
I edited my post above as noted.
I also wanted to add another FMCSA link which seems to suggest the possibility of a reciprocity agreement between adjoining states which may affect the need of a CDL [(383.3 (d)(1)] :
https://www.fmcsa.dot.gov/regulations/title49/section/383.3
Bought trailer out of state... Can I legally go get it?
