21-A M.R.S. §331: Primary required

1. Nomination by primary election. A party's nomination of a candidate must be made by primary election, as provided in this Article. When there is an office for which no candidate has qualified either by filing a petition and consent under sections 335 and 336 or as a write-in candidate in accordance with section 722‑A, the Secretary of State is not required to list the office on the primary ballot. The Secretary of State is not required to print a primary ballot if there are no offices for which a candidate has qualified.

2. Exceptions. This Article does not apply to:

A. Nominations for presidential electors;

B. Nominations to fill vacancies under subchapter III; and

C. Nominations by petition under subchapter II.

3. Limitations to candidacy. The following limitations apply to all candidates for nominations.

A. A person may not file, whether by primary election or nomination petition, as a candidate for more than one federal, state or county office at any election, except for a candidate for membership in a county charter commission or a candidate for presidential elector under section 351, subsection 3.

B. A person may file as a candidate for any federal, state or county office either by primary election or nomination petition but not by both, except for a candidate for membership in a county charter commission under section 351, subsection 3.