Each ordinance providing for:
(a) The appropriation of money;
(b) An annual tax levy, and
(c) Improvements petitioned for by the owners of a majority of the foot frontage of the property benefited or by the owners of a majority of the parcels of the property benefited and to be specially assessed therefor, and
(d) Any emergency ordinance or resolution necessary for the immediate preservation of the public peace, health or safety, shall take effect, unless a later time be specified therein, upon its signature by 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. No other ordinance or resolution shall go into effect until thirty (30) days after its final passage by the Council. Such emergency ordinances or resolutions must, upon a yea and nay vote receive not less than five (5) votes of all the members elected to Council. The reason or reasons for such necessity shall not be required to be set forth in the ordinance or resolution, but in the title and in at least one (1) section of the ordinance or resolution, the measure must be declared to be an emergency ordinance or resolution. An ordinance or resolution which by its terms is styled an emergency measure but which fails to receive a sufficient number of votes to pass it as an emergency measure, shall be governed with respect to its passage and effective date by the provisions of this Charter relating to non-emergency ordinances and resolutions; and with respect to its being subject to the referendum, it shall be governed by Section 4, General Provisions, of Article X.