Under Article V, Section 4, a person must as of the commencement of the term in office, be 30 years old, for 15 years a citizen of the United States, and for five years a resident of Maine. A governor must retain residency in Maine throughout his or her term. Section 6 provides that a person cannot be take office while holding any other office under the United States, Maine, or "any other power".
Governors are elected directly for four-years terms, with a limit of two consecutive elected terms. Thus, a governor can serve an unlimited number of terms, as long as they serve no more than two in a row. Elections are by popular vote, but if two people tie for first place, the Legislature meets in joint session to choose between them.
The governor is commander-in-chief of "the army and navy of the State, and of the militia" (the Maine National Guard) except when under federal control. The governor generally has the power appoint civil, military, and judicial officers (aside from probate judges and justices of the peace) subject to confirmation by the Legislature unless the Maine Constitution or a statute has provided another means of appointment. He or she also has the power to grant pardons, reprieves, and commutations except in cases of impeachment. This clemency power also includes juvenile offenses.
The Governor oversees the executive branch, which includes Maine's state agencies. His cabinet is often considered to be the state's commissioners, which are generally nominated by the governor but legally chosen by the Maine Legislature.