An emergency measure is an ordinance or resolution necessary for the immediate preservation of the public peace, health or safety, or providing for the usual daily operation of a municipal department, and shall take effect, unless a later time be specified therein, upon passage by Council and the signature of the Mayor, or upon the expiration of the time within which it may be disapproved by the Mayor, or upon its passage after disapproval by the Mayor, as the case may be. Ordinances providing for the appropriation of money, or for an annual tax levy, or for improvements petitioned for by the owners of a majority of the front footage of the property benefited and to be specially assessed therefor, may be passed as and take effect at the same time as emergency measures. No action of the Council in authorizing any change in the boundaries of the Municipality, or the surrender or joint exercise of any of its powers, or in granting any franchise, or in contracting for the supply to the Municipality or its inhabitants, of the product or service of any utility, whether municipally owned or not, shall ever be passed as an emergency measure. Emergency ordinances and resolutions, shall only be passed by a 2/3 vote of all the members elected to the Council and the reasons for declaring such ordinance or resolution an emergency measure shall be set forth, in the preamble or in one section of the ordinance or resolution.