(2) Contacted appropriate officials of the District government, either orally in the presence of a witness or in writing, concerning existing violations of the housing regulations in the rental unit the tenant occupies or pertaining to the housing accommodation in which the rental unit is located, or reported to the officials suspected violations which, if confirmed, would render the rental unit or housing accommodation in noncompliance with the housing regulations;
(3) Legally withheld all or part of the tenant’s rent after having given a reasonable notice to the housing provider, either orally in the presence of a witness or in writing, of a violation of the housing regulations;
(4) Organized, been a member of, or been involved in any lawful activities pertaining to a tenant organization;
(5) Made an effort to secure or enforce any of the tenant’s rights under the tenant’s lease or contract with the housing provider; or
(6) Brought legal action against the housing provider.