This final rule establishes the definition of "chronically homeless" that will be used in HUD's Continuum of Care Program, and in the Consolidated Submissions for Community Planning and Development Programs. This definition has been the subject of significant public comment which has guided HUD in establishing the definition of "chronically homeless" that will be used in its homeless assistance programs. The final rule also establishes the necessary recordkeeping requirements that correspond to the definition of "chronically homeless" for the Continuum of Care Program. Historically, other programs within HUD, as well as other agencies such as the United States Interagency Council on Homelessness and the Department of Veteran Affairs, have adopted HUD's definition of chronically homeless and may also choose to adopt the definition of "chronically homeless" included in this final rule, however, it is not required.