Me. Const. art. IV, pt. 1, § 1

Legislative department; style of acts. The legislative power shall be vested in 2 distinct branches, a House of Representatives, and a Senate, each to have a negative on the other, and both to be styled the Legislature of Maine, but the people reserve to themselves power to propose laws and to enact or reject the same at the polls independent of the Legislature, and also reserve power at their own option to approve or reject at the polls any Act, bill, resolve or resolution passed by the joint action of both branches of the Legislature, and the style of their laws and Acts shall be, "Be it enacted by the people of the State of Maine."