Not less than 10 nor more than 30 days prior to any public hearing being held pursuant to this chapter, the developer, all benefiting property owners and the general public shall be notified of the hearing and the purpose thereof. Public notice shall be accomplished by a written notice posted at City Hall and other conspicuous locations as the Council may determine to be appropriate, and by a written notice published in a newspaper of general circulation in the community, once in either of the 2 consecutive weeks prior to the hearing. Notification of benefiting property owners shall also be accomplished by regular mail, or by personal service. If notification is accomplished by mail, notice shall be made on the date that the letter of notification is posted. Failure of any owner to be so notified shall not invalidate or otherwise affect any advance financing resolution or the Council’s action to approve or not to approve the same.