According to Section 4-12 of the Code of the Town of Dover, “there shall be a 5-member Planning Board elected on a rotating basis of 1 member each year for a 5-year term. The Planning Board’s duties and authority shall include, but shall not be limited to, those specified in M.G.L. ch. 41, § 81A et seq. An associate member of the Planning Board shall be elected at the Annual Town Election for a two-year term. Any vacancy in the position shall be filled in accordance with the procedure prescribed in Chapter 41, Section 81A, of the Massachusetts General Laws. The Chairman of the Planning Board, when acting as special permit granting authority, may designate the associate member to sit on this Board for the purposes of acting on a Special Permit application in the case of the absence, inability to act, or conflict of interest on the part of any member of the Planning Board or in the event of a vacancy on this board.