No vehicle shall be operated or moved on any highway unless such vehicle is so constructed,
maintained, and loaded as to prevent its contents from dropping, sifting, leaking
or otherwise escaping therefrom; provided, however, that no provision of this section
shall apply to any (i) motor vehicle which is used exclusively for agricultural purposes
and which is not operated on or over any public highway for any other purpose other
than for the purpose of operating it across a highway or along a highway from one
point of the owner's land to another part thereof irrespective of whether or not the
tracts adjoin; (ii) to any agricultural vehicle, tractor or other vehicle exempted
from registration and licensing requirements pursuant to state law; or (iii) to any
motor vehicle transporting poultry or livestock. (3-13-63; 1961 Code, § 16-165; 19-79-82;
26-81-82.)