Me. Const. art. IV, pt. 3, § 1

The Legislature shall convene on the first Wednesday of December following the general election in what shall be designated the first regular session of the Legislature; and shall further convene on the first Wednesday after the first Tuesday of January in the subsequent even-numbered year in what shall be designated the second regular session of the Legislature; provided, however, that the business of the second regular session of the Legislature shall be limited to budgetary matters; legislation in the Governor's call; legislation of an emergency nature admitted by the Legislature; legislation referred to committees for study and report by the Legislature in the first regular session; and legislation presented to the Legislature by written petition of the electors under the provisions of Article IV, Part Third, Section 18. The Legislature shall enact appropriate statutory limits on the length of the first regular session and of the second regular session. The Legislature may convene at such other times on the call of the President of the Senate and Speaker of the House, with the consent of a majority of the Members of the Legislature of each political party, all Members of the Legislature having been first polled. The Legislature, with the exceptions hereinafter stated, shall have full power to make and establish all reasonable laws and regulations for the defense and benefit of the people of this State, not repugnant to this Constitution, nor to that of the United States.