‘Sec. 5. Terms of trustees; vacancies. After the election of the first board, trustees are elected to 3-year terms in accordance with the Maine Revised Statutes, Title 35-A, section 6410, subsection 1. Notwithstanding Title 35-A, section 6410, subsection 1, any vacancy occurring because of change of residence, resignation or death of a trustee or any other cause except normal expiration of term of office may be temporarily filled by appointment of a person that meets the qualifications under section 3 by the remaining trustees until the time of the next municipal election for which nomination papers may be filed. At the time of the next municipal election for which nomination papers may be filed, the vacancy must be filled for the remainder of the term by a trustee elected in accordance with this charter.’