The vote on the question of passage of each ordinance, resolution, and motion shall be taken by roll call vote and entered on the Journal, and no ordinance, resolution or motion shall be passed without concurrence of at least six Council members, except that each emergency ordinance or resolution shall require the affirmative vote of at least seven Council members for its enactment, provided that if such emergency ordinance or resolution shall fail to receive the required seven votes, but receives the necessary six votes for passage as a non-emergency ordinance or resolution, it shall be considered as a non-emergency ordinance or resolution and shall become effective as hereinafter provided by this Charter. Any non-emergency ordinance or resolution can be changed to an emergency ordinance or resolution by an affirmative vote of at least seven Council members.