Any owner who wishes to dispute the costs of enforcing the provisions of 5.25.030 which has been carried out pursuant to the provisions of 5.25.040 may request a hearing before the director. The owner or agent thereof shall file with the director a request in writing for a hearing within twenty days after the city has mailed the demand for payment to the owner. The hearing shall be conducted within thirty days after receipt of said request for hearing. The hearing shall be conducted informally and the formal rules of evidence shall not apply. The director shall listen to whatever witnesses the owner might wish to call and the director shall, at the conclusion of the hearing, determine whether or not the costs assessed were proper. Such determination shall be final unless that determination is appealed to a Court of competent jurisdiction within ten calendar days of the rendition thereof. (Ord. 90-17 §5, 1990).