(d) No landlord may cause a tenant to quit involuntarily or threaten to bring any action to recover possession, or decrease any services, or increase the rent, or take any other action where the landlord's dominant motive is retaliation for the tenant's exercise of any rights under the law. Such retaliation shall be a defense to any action to recover possession. In an action to recover possession of a rental unit, proof of the exercise by the tenant of rights under the law within six months prior to the alleged act of retaliation shall create a rebuttable presumption that the landlord's act was retaliatory.
(e) It shall be unlawful for a landlord or any other person who willfully assists the landlord to endeavor to recover possession or to evict a tenant except as provided in Section 37.9(a) and (b). Any person endeavoring to recover possession of a rental unit from a tenant or evicting a tenant in a manner not provided for in Section 37.9(a) or (b) without having a substantial basis in fact for the eviction as provided for in Section 37.9(a) shall be guilty of a misdemeanor and shall be subject, upon conviction, to the fines and penalties set forth in Section 37.10A. Any waiver by a tenant of rights under this Chapter 37 shall be void as contrary to public policy.