D.C. Mun. Regs. tit. 10, r. 10-C203
Application for designation of a property as a historic landmark or historic district shall be made only by the owner of the property, the Board, a public agency, governmental unit or department, Advisory Neighborhood Commission, or a historic preservation organization.
The staff may request a copy of an organization's bylaws or other establishment papers if needed to confirm its eligibility as an applicant.
A historic preservation organization established for membership or purposes within a specific neighborhood or area of the District of Columbia shall be an eligible applicant only with respect to properties within that neighborhood or area.
Any eligible applicant may co-sponsor a nomination with any other eligible applicant.
D.C. Mun. Regs. tit. 10, r. 10-C203