Within twenty days after service of the decision of the administrative hearing officer upon the responsible person, the responsible person may seek de novo review of the decision by filing a notice of appeal with the Los Angeles Superior Court. The responsible person shall serve upon the city clerk, either in person or by registered mail, a copy of the notice of appeal. If the responsible person fails to timely file a notice of appeal, the administrative hearing officer's decision shall be deemed confirmed. (Ord. 629, § 2, 2009).