Montana Constitution, Article XII
Section 1. Agriculture. (1) The legislature shall provide for a Department of Agriculture and enact laws and provide appropriations to protect, enhance, and develop all agriculture.
(2) Special levies may be made on livestock and on agricultural commodities for disease control and indemnification, predator control, and livestock and commodity inspection, protection, research, and promotion. Revenue derived shall be used solely for the purposes of the levies. 