California Vehicle Code
Sec.
§
667
(a)
A utility trailer is a trailer or semitrailer used solely for the transportation of the users personal property, not in commerce, which does not exceed a gross weight of 10,000 pounds or a manufacturers gross vehicle weight rating of 10,000 pounds.
(b)
Notwithstanding subdivision (a), a utility trailer includes a trailer or semitrailer designed and used for the transportation of livestock, not in commerce, which does not exceed a gross weight of 10,000 pounds or a manufacturers gross vehicle weight rating of 10,000 pounds.