The Board of Aldermen of the City of Rutland is authorized to revise the existing ordinances of said City and shall have authority to strike out and repeal obsolete and repetitive enactments, to amend, repeal, compile, delete, renumber, or rearrange any existing ordinance or part thereof as it may deem proper and expedient so as to condense the whole into concise and comprehensive form. Such revision shall not affect an act done, a right accruing, accrued, acquired, or established, a penalty incurred, a suit, prosecution, or proceeding pending, or the tenure of a person holding office at the time when it takes effect. The separate ordinances that may be contained in such revision need not be published in full in one or more newspapers in said City as prescribed in section 5.1 herein, but in lieu thereof at least 200 copies of each revised ordinance shall be made available to the public at cost in the office of the City Clerk of said City and a statement setting forth (1) the substance of the proposed amendments, prepared by the City Attorney and approved by the Board of Aldermen, and (2) a notice that 200 copies of the ordinance or ordinances as revised are available to the public at cost at the office of the City Clerk, shall be published in one or more newspapers in said City at least 20 days before such proposed amendments shall take effect.