When a vacancy occurs as the result of a recall election or when an elective officer resigns after a recall petition certified by the City Clerk to be sufficient is presented to Council, the vacancy shall be filled in accordance with the provisions of Section 3.4 of this Charter; provided, however, that in the event of the simultaneous recall of two or more Councilmen, the remaining members of Council shall immediately cause a special election to be held in not less than forty-five days nor more than ninety days from the date of certification of the results of the recall election unless the general municipal election shall occur within one hundred twenty days.