Wyoming: Wyoming Highway Patrol, Port of Entry Station, Cheyenne, WY. 307-777-4317.

31-5-228.  Loads on Vehicles.

No vehicle shall be driven or moved on any highway unless the vehicle is so constructed or loaded as to prevent any of its load from dropping, sifting, leaking or otherwise escaping therefrom.  This section does not prohibit the necessary spreading of any substance in highway maintenance of construction operations.