(3) Upon the expiration of such thirty day comment period, the commissioner may (i) determine that no harassment has occurred within the stated period of time and forthwith grant such certification, (ii) determine that a waiver of certification may be granted pursuant to subdivision e of this section and forthwith grant such waiver, or (iii) deny such certification without a prior hearing if there has been a finding by the office of rent control, the conciliation and appeals board or any court having jurisdiction that there has been harassment, unlawful eviction or arson by or on behalf of the owner at the multiple dwelling for which certification is sought during the stated period of time; or (iv) where there has been no prior determination of harassment, unlawful eviction or arson by or on behalf of the owner, provide that a hearing be held in the manner provided in section 27-2092 of this article if the commissioner has reasonable cause to believe that harassment has occurred within such stated period of time and that a waiver of certification may not be granted. At such hearing, the owner of the multiple dwelling for which such certification is sought, shall have the opportunity to be heard by the commissioner or a designee prior to the granting or denial of certification or of a waiver thereof. Notice of such hearing shall be given to the applicant and to other interested parties, governmental agencies and local community board in the manner to be prescribed by rules and regulations of the commissioner. Within forty-five days after such hearing, the commissioner shall either grant or deny such certification or waiver thereof.