Sec. 3. Sections 4 through 5 of this chapter and IC 9-19-4-3, IC 9-19-4-4, and IC 9-19-5-7:
(1) do not apply to:
(A) machinery or equipment used in highway construction or maintenance by the Indiana department of transportation, counties, or municipalities;
(B) farm drainage machinery;
(C) implements of agriculture when used during farming operations or when constructed so that they can be moved without material damage to the highways; or
(D) firefighting apparatus owned or operated by a political subdivision or a volunteer fire department (as defined in IC 36-8-12-2); and
(2) do not limit the width or height of farm vehicles when loaded with farm products.