OAR 740-100-0230. Use of Trailers Prohibited

(1) Except as described in subsections (2) or (3) of this rule, a trailer or other vehicle may not be attached to a passenger carrying commercial motor vehicle without special authorization from the Department. (2) This rule does not require special authorization for a commercial motor vehicle transporting passengers to be operated with a trailer if: (a) The trailer does not exceed 8,000 pounds gross weight; (b) Operations do not exceed the manufacturer's gross combined weight rating for the combination; and (c) No passengers are allowed to be transported in the trailer. (3) This rule does not prohibit use of semitrailer equipment specially designated for carrying passengers.