Mont. Code Ann. § 20-15-223
Vacancies
20-15-223 . Vacancies. (1) A community college trustee position is vacant whenever the incumbent:
(a) dies;
(b) resigns; or
(c) is removed under the provisions of 20-15-227 .
(2) A trustee position is also vacant whenever an elected candidate fails to qualify under the provisions of 20-3-307 .
(3) Any vacancy of a trustee position shall be filled by appointment by majority vote of the remaining trustees, and the person appointed shall hold office until the next regular school election day, when a trustee shall be elected for the remainder of the unexpired term.