Colorado constitution
Article V
Section 39

Every order, resolution or vote to which the concurrence of both houses may be necessary, except on the question of adjournment, or relating solely to the transaction of business of the two houses, shall be presented to the governor, and before it shall take effect, be approved by him, or being disapproved, shall be re­passed by two­thirds of both houses, according to the rules and limitations prescribed in case of a bill.