Board of Assessors. A Board of Assessors of three members shall be appointed by the Board of Selectmen for three-year overlapping terms. The Board of Selectmen may also appoint one alternate member for a three year term. The role of this alternate will be to exercise the duties and responsibilities of a regular Board of Assessors member in the absence of one or more regular members or in the event of a conflict of interest of one or more members such that a quorum is not present. The alternate and regular members shall possess appropriate qualifications or obtain the necessary training, at town expense, after appointment.