Indiana Code Title 9. Motor Vehicles § 9-17-4-10

The legislature hereby finds and declares that voluntary and orderly conversion to the metric system of weights and measures is of vital importance to the economy of the state.  It is hereby declared to be the public policy of this state to encourage the gradual implementation of the metric system throughout the state's government, industry, commerce, business, education and agriculture.  This article is enacted in the exercise of the public power in order to encourage such implementation and to provide a revised code of weights and measures which will be responsive to the present and future needs of commerce, industry and consumers.  The legislature finds and declares that the coordination and administration of this unitary regulatory system governing weights and measures throughout the state should be, and is hereby, vested in the commissioner of agriculture and markets and that enforcement of this article by the counties and cities of the state shall be under his supervision.