Ariz. Rev. Stat. § 28-1098
A. For the purpose of highway safety or air pollution prevention, a person shall not drive or move a vehicle on a highway, street or roadway unless the vehicle is constructed or loaded in a manner to prevent any of its load from dropping, sifting, leaking or otherwise escaping from the vehicle, except the following are allowed:
D. If a person is found in violation of this section and the violation:
1. Does not cause any damage or injury and is the person's: