(7) Payment or Refund of Rents to Implement Arbitration Decision. Upon finding that all or any portion of the rent increase is or is not justified, or that any nonconforming rent increase is null and void, the Administrative Law Judge may order payment or refund of all or a portion of that cumulative amount within 15 days of the mailing of the findings of fact or may order the amount added to or offset against future rents; provided, however, that any such order shall be stayed if an appeal is timely filed by the aggrieved party. The Administrative Law Judge may order refunds of rent overpayments resulting from rent increases which are null and void for no more than the three-year period preceding the month of the filing of a landlord or tenant petition, plus the period between the month of filing and the date of the Administrative Law Judge's decision. In any case, calculation of rent overpayments and re-setting of the lawful base rent shall be based on a determination of the validity of all rent increases imposed since April 1, 1982, in accordance with Sections 37.3(b)(5) and 37.3(a)(2) above.
(8) Finality of Administrative Law Judge's Decision. The decision of the Administrative Law Judge shall be final unless the Board vacates his decision on appeal.
(f) Appeals.