Maine constitution
Article IV-3: legislative power
Section 2

Every bill or resolution, having the force of law, to which the concurrence of both Houses may be necessary, except on a question of adjournment, which shall have passed both Houses, shall be presented to the Governor, and if the Governor approves, the Governor shall sign it; if not, the Governor shall return it with objections to the House in which it shall have originated, which shall enter the objections at large on its journals, and proceed to reconsider it. If after such reconsideration, 2/3 of that House shall agree to pass it, it shall be sent together with the objections, to the other House, by which it shall be reconsidered, and, if approved by 2/3 of that House, it shall have the same effect as if it had been signed by the Governor; but in all such cases, the votes of both Houses shall be taken by yeas and nays, and the names of the persons, voting for and against the bill or resolution, shall be entered on the journals of both Houses respectively. If the bill or resolution shall not be returned by the Governor within 10 days (Sundays excepted) after it shall have been presented to the Governor, it shall have the same force and effect as if the Governor had signed it unless the Legislature by their adjournment prevent its return, in which case it shall have such force and effect, unless returned within 3 days after the next meeting of the same Legislature which enacted the bill or resolution; if there is no such next meeting of the Legislature which enacted the bill or resolution, the bill or resolution shall not be a law.