D.C. Mun. Regs. tit. 14, r. 14-1823
A family with a Certificate of Eligibility shall be responsible for finding a rental unit suitable to the family's needs and desires. A family may select the rental unit which it already occupies if the unit qualifies.
If requested by the family, DCHA shall assist families with a Certificate of Eligibility where, because of age, handicap, large family size, or other reasons, the family is unable to locate an approvable unit.
DCHA shall provide assistance in finding units to those families with a Certificate of Eligibility who allege that illegal discrimination on grounds of race, religion, sex, national origin, age or handicap is preventing the family from finding a suitable unit.
DCHA shall not directly or indirectly reduce a family's opportunity to choose among the available units in the housing market except as provided for in chapters 20 and 21 of this subtitle.
Allegations of unlawful discrimination by housing providers against families receiving or eligible to receive Tenant Assistance Program assistance by reason of their participation or potential participation in the program shall be referred to the Department of Consumer and Regulatory Affairs for prompt investigation and provision of a written response to the complaining party on the conclusion of the investigation.
D.C. Mun. Regs. tit. 14, r. 14-1823