Ordinances or other measures providing for appropriations for the current expenses of the municipality, or for street improvements petitioned for by the owners of a majority of the feet front of the property benefitted and to be especially assessed for the cost thereof, and emergency ordinances or measures necessary for the immediate preservation of the public peace, health or safety in the municipality, shall go into immediate effect. Such emergency ordinances or measures must, upon a yea and nay vote, receive a 2/3 vote of all the members elected to the Legislative Authority, and the reasons for such necessity shall be set forth in one section of the ordinance or other measure.
(R.C. § 731.30)