The term of office on the Zoning and Planning Commission for the Mayor shall be for his/her term as such Mayor; the term of office on the Zoning and Planning Commission for the City Engineer shall be for his/her employment as City Engineer; and the term of office on the Zoning and Planning Commission for the member of the City Council shall be until another member is selected by the City Council. The term of office of each of the citizen members of the Zoning and Planning Commission shall be for four (4) years; provided, that of the first (1st) members of the Zoning and Planning Commission, one (1) shall serve for one (1) year, one (1) shall serve for two (2) years, one (1) shall serve for three (3) years and two (2) shall serve for four (4) years.