SECTION 20. EXCEPTION AS TO NEWSPAPER PUBLICATION OF CODE ORDINANCES.
   Notwithstanding the provisions of the foregoing sections, ordinances establishing regulations for the construction of buildings, the installation of plumbing, the installation of electric wiring, or any similar construction code, or income tax code or regulations, or revision and recodification of ordinances without modification of substance, which code or recodification it is provided by the ordinance shall be published in printed form for distribution need not be published in a newspaper, either before or after final passage. At least three correct copies of the ordinance, in the form in which it has been passed on the first reading shall, however, be made available to public inspection in the office of the City Clerk and in lieu of publication of the ordinance, there shall be published a notice, describing the ordinance in brief and general terms and stating that the ordinance is available for public inspection at the office of the City Clerk, together with the time and place when and where it will be considered for final passage, and after final passage, a notice describing the ordinance in brief and general terms and stating that it is available for public inspection in the office of the City Clerk and will take effect thirty days after such publication unless submitted to referendum in which event it will not take effect unless approved as required by law.