D.C. Code § 42-3404.16
Unlawful acts.
(a) It shall be unlawful for any person to:
(1) Coerce a tenant or tenant organization to waive their rights under this subchapter ;
(2) Retaliate against or harass a tenant seeking to exercise their rights under this subchapter ; or
(3) Make fraudulent or misleading statements or engage in conduct intended to prevent a tenant from exercising their rights under this subchapter .