All resolutions authorizing abatement or removal of nuisances enacted prior to the passage of this article under the authority of any other act are hereby given full force and effect and the city may proceed to have said nuisances removed or abated by either the city or by a duly authorized private contractor, company, enterprise, or individual. The procedure for confirming the account report shall be in accord with the provisions of this article.
All account reports previously confirmed prior to the enactment of this article are hereby given full force and effect and the city may proceed to collect these special assessments in the same manner as provided by prior law.