The Council, when it deems necessary, may appoint a Board of Zoning Appeals consisting of three electors of the Municipality to serve three-year staggered and overlapping terms of office. Of those first appointed, one shall serve one year, one shall serve two years, and one shall serve three years. Until Council establishes a Board of Zoning Appeals, the Planning Commission shall act as such, and shall, while so acting, be known as the Administrative Board for Planning and Zoning Appeals. When appointed, the Board shall establish its own rules of procedure and keep a record of its proceedings in all matters coming before it. The Board of Zoning Appeals shall have those powers, duties and functions as provided by this Charter and as provided by the ordinances and resolutions of the Municipality.