49 U.S.C. 13506(a)(6) provides an exemption from regulation for motor vehicles used in carrying ordinary livestock, fish, and unmanufactured agricultural commodities. Certain specific commodities have been statutorily determined to be non-exempt. Administrative Ruling No. 133, which is reproduced below, is a list of those commodities that are non-exempt by statute.
[53 FR 17707, May 18, 1988, as amended at 62 FR 15421, Apr. 1, 1997]