partment’s determination but not approved by the hearing officer shall be forthwith refunded by the landlord to the tenant or tenants from whom such rent increases were collected, or offset by the landlord against the next legally due rental payment. (Amended by Ord. No. 156,597, Eff. 5/20/82, Oper. 5/15/82.) c. If a request for hearing is received by the Department within the 15 day period, then the requested hearing shall be held within 30 days of the receipt of the request by a hearing officer designated by the Department. Notice of the time, date and place of the hearing shall be mailed by the Department to the applicant and tenants of the subject rental units at least 10 days prior to the hearing date. (Amended by Ord. No. 156,597, Eff. 5/20/82, Oper. 5/15/82.) d. The hearing shall be conducted by a hearing officer designated by the Department. At the time of the hearing the landlord and/or any affected tenant may offer such documents, testimony, written declarations or evidence as may be pertinent to the proceedings. e. In making a determination on an application for rent increase, the designated hearing officer shall make a written determination upholding, reversing or modifying the determination of the Department. If the determination is to reverse or modify the determination of the Department, the hearing officer shall specifically set forth the reasons or such reversal or modification. f. Time Limit . A final decision shall be made by the hearing officer within 45 days of the termination of the time for filing of a request for hearing. The Department shall mail copies of the findings and determination of the hearing officer to the applicant and all affected tenants. Said findings and determination shall provide that any rent increases approved on or after January 1, 1981 for capital improvements or rehabilitation work begun prior to June 1, 1982 shall not be included as part of the maximum adjusted rent for purposes of computing rent increases pursuant to Section 151.06 of this chapter. (Amended by Ord. No. 156,597, Eff. 5/20/82, Oper. 5/15/82.) 4. Limitation on Rent Adjustment. (Added by Ord. No. 154,808, Eff. 2/13/81.) a. (Amended by Ord. No. 156,597, Eff. 5/20/82, Oper.