5-a. Any lease provision which seeks to assess a fee, penalty or
dollar charge, in addition to the stated rent, against a tenant because
such tenant files a bona fide complaint with the landlord, the
landlord's agent or a building code officer regarding the condition of
such tenant's leased premises shall be null and void as being against
public policy. A landlord or agent of the landlord who seeks to enforce
such a fee, penalty or charge shall be liable to the tenant for triple
the amount of such fee, penalty or charge.