Each emergency resolution and ordinance shall contain a statement of the necessity for such emergency action, and its enactment shall require the affirmative vote of at least 6 members of Council if all members are present, or the affirmative vote of at least 5 members if one or more members are absent.
   No action of Council authorizing the surrender or joint exercise of any of its powers, or in granting any franchise, or in the enactment, amendment, or repeal of any zoning or building resolution or ordinance, or in the changing of any ward boundaries, or in authorizing any change in the boundaries of the Municipality, shall be enacted as an emergency measure.