The Council shall have the power to amend the bylaws in the following manner: The proposed amendment or alteration of the bylaws shall be approved by the affirmative vote of 2/3 of the members of the Council, and such proposed amendment or alteration shall be considered at a special meeting of the Council called for such purpose upon not less than 14 days' prior notice, or at a regular meeting not less than 14 days prior to which notice of the proposed action shall have been given in either case notice to be accompanied by full text and purpose of the proposed amendment or alteration.