Wyo. Const. art. 3, § 31: Supplies for legislature and departments.

All stationery, printing, paper, fuel and lights used in the legislature and other departments of government shall be furnished, and the printing and binding of the laws, journals and department reports and other printing and binding, and the repairing and furnishing the halls and rooms used for the meeting of the legislature and its committees shall be performed under contract, to be given to the lowest responsible bidder, below such maximum price and under such regulations as may be prescribed by law. No member or officer of any department of the government shall be in any way interested in any such contract; and all such contracts shall be subject to the approval of the governor and state treasurer.