Applications for a hearing contesting the validity of the impoundment or immobilization under this Part 3 shall be heard to determine:whether or not there were, at the time such vehicle was impounded or immobilized, 3 or more unsatisfied citations for parking violations against such vehicle; and whether a period of 30 days or more had elapsed since the 3^rd unsatisfied citation. The hearing officer may also consider such other relevant facts and circumstances, as he deems necessary, in making a determination as to the validity of the impoundment. City Code, 1976/83, art. 31, §90(c) Ord. 69-343 Ord. 74-768 Ord. 83-864