The Director of the Planning and Public Works Department is authorized to provide promotional discounts to the rates set forth in PCC 2.112.010, 2.112.020, and 2.112.030 when determined necessary to encourage increased tenant interest in Pierce County airport facilities. Such discounts shall be one-time and shall have duration not to exceed one year in length. The Director shall submit a report to the Pierce County Council on a bi-annual basis which identifies any promotional discounts authorized by the Director, the purpose of the discount, and its amount and duration.