The members of Council shall be elected from the several wards of the City, in the manner hereinafter provided, at the first regular Municipal election following the effective date of this revised Charter. Their term of office shall begin with the first day of the fiscal year immediately following such election, and shall continue for a period of four years. If a vacancy shall occur in Council during any such term, because of death, resignation, incapacity or other cause or condition, including the election of a member of Council to fill a vacancy in the office of Mayor, the remaining members of Council, by a majority vote, shall elect a qualified person from the proper ward to fill the vacancy. If such vacancy is not filled within a period of six weeks after the occurrence of the vacancy, Council shall cause a special election to be held in the ward within ninety days after the expiration of such six weeks period unless a regular election is scheduled to be held within one hundred twenty days after the expiration of such period, in which event, the vacancy shall be filled at such regular election. Any such election to fill a vacancy shall be held in the same manner and under the same procedure as any regular Municipal election, except that the successor elected shall take office immediately and hold office for the unexpired term of his predecessor.