Maryland Real Property Section 8-208.2
§ 8-208.2.
  (a)   Notwithstanding the provisions of § 8-208.1 of this subtitle, a landlord of real property subject to the provisions of Title 6, Subtitle 8 of the Environment Article may not evict or take any other retaliatory action against a tenant primarily as a result of the tenant providing information to the landlord under Title 6, Subtitle 8 of the Environment Article.
  (b)   For purposes of this section, a retaliatory action includes:
    (1)   An arbitrary refusal to renew a lease;
    (2)   Termination of a tenancy;
    (3)   An arbitrary rent increase or decrease in services to which the tenant is entitled; or
    (4)   Any form of constructive eviction.
  (c)   A tenant subject to an eviction or retaliatory action under this section is entitled to the relief, and is eligible for reasonable attorney's fees and costs, authorized under § 8-208.1 of this subtitle.
  (d)   Nothing in this section may be interpreted to alter the landlord's or the tenant's rights arising from a breach of any provision of a lease.