The Zoning Board of Review shall be appointed by the Town Council and shall consist of five members, each to hold office for the term of five years; provided, however, that the original appointments shall be made for terms of one, two, three, four, and five years, respectively. The Zoning Board of Review shall also include two alternates, to be designated as the first and second alternate members, their terms to be for five years. These alternate members shall sit and may actively participate in hearings. The first alternate shall vote if one member of the Board is unable to serve at a hearing and the second shall vote if two members of the Board are unable to serve at a hearing. In the absence of the first alternate member, the second alternate member shall serve in the position of the first alternate. No member or alternate may vote on any matter before the Board unless he or she has attended all hearings concerning that matter. Members of the Zoning Board of Review, at the time of their appointment and for the duration of their term, shall be residents and qualified to vote in the Town of Westerly.