Any ordinances which must be passed and made effective at once in order to meet an emergency in the operation of the city government, or which are necessary for the immediate preservation of the public peace, health, safety, morals or public welfare may be passed, provided the council shall, in a separate section thereof, adopted by an affirmative vote of not less than five members of the council, declare that such an emergency exists giving its reasons therefor. No ordinance granting a franchise or fixing a rate to be charged by a public utility corporation shall be passed as an emergency ordinance. (Amended 11-7-89)