(a)
(1) Any owner who is found by the DHCR, after a reasonable opportunity to be heard, to have collected any rent or other consideration in excess of the legal regulated rent shall be ordered to pay to the tenant a penalty equal to three times the amount of such excess, except as provided under subdivision (f) of this section. In no event shall such treble damage penalty be assessed against an owner based solely upon the owner's failure to file any timely or proper rent registration statement. If the owner establishes by a preponderance of the evidence that the overcharge was not willful, the DHCR shall establish the penalty as the amount of the overcharge plus interest, which interest shall accrue from the date of the first overcharge on or after the base date, at the rate of interest payable on a judgment pursuant to section 5004 of the Civil Practice Law and Rules, and the order shall direct such a payment to be made to the tenant.
(2) A complaint pursuant to this section must be filed with the DHCR within four years of the first overcharge alleged, and no determination of an overcharge and no award or calculation of an award of the amount of an overcharge may be based upon an overcharge having occurred more than four years before the complaint is filed; additionally:
(i) a penalty of three times the overcharge may not be based upon an overcharge having occurred more than two years before the complaint is filed or upon an overcharge which occurred prior to April 1, 1984; and