SECTION 507.  EFFECTIVE DATE.
   No ordinance passed by the Council shall take effect until thirty (30) days after its passage and approval as an ordinance, except the following ordinances:
   (a)   Relating to an election.
   (b)   For the immediate preservation of the public peace, health or safety, containing a declaration of the facts constituting the urgency, and is passed by a four-fifths vote of the City Council.
   (c)   Relating to street improvement proceedings.
   (d)   Relating to taxes for the usual and current expenses of the city.
   (e)   Covered by particular provisions of law prescribing the manner of its passage and adoption.