(a) Any court shall advance on the docket or otherwise expedite the disposition of any action or proceeding brought before it under subdivision 10 of section 1 of the State Enabling Act.

(b) Except as otherwise provided therein, the provisions of sections 2206.2 through 2206.9 of this Part are cumulative. The enforcement of one provision herein shall not constitute a bar to the enforcement by action, proceeding or by making a finding or determination pursuant to other provisions of these regulations.

(c) The administrator may direct that a refund payment to the tenant, for rent collected in violation of subdivision a of section Y51-10.0 of the Rent Law, include interest from the date of each excessive payment of rent. Where the administrator has revoked an order or determination premised on a false statement or entry, he may withhold issuance of an order granting increase in maximum rent for such housing accommodations until the landlord has complied with the refund directive, if any, provided for in such order of revocation.

(d) No person (including but not limited to any officer or employee of the Division of Housing and Community Renewal) shall be held liable for damages or penalties in any court, on any grounds for or in respect of anything done or omitted to be done in good faith pursuant to any provision of the State Rent Act or the Rent Law, or any regulation, order or requirement thereunder, notwithstanding that subsequently such provision, regulation, order or requirement may be modified, rescinded, or determined to be invalid. In any action or proceeding wherein a party relies for ground of relief or defense or raises issue or brings into question the construction or validity of any provision of the Rent Law, or any regulation, order or requirement thereunder, the court having jurisdiction of such action or proceeding may at any stage certify such fact to the Division of Housing and Community Renewal. The administrator may intervene in any such action or proceeding.