In general .—

(A) Any family receiving tenant-based assistance under subsection ( o ) may receive such assistance to rent an eligible dwelling unit if the dwelling unit to which the family moves is within any area in which a program is being administered under this section.

(B) (i) Notwithstanding subparagraph (A) and subject to any exceptions established under clause (ii) of this subparagraph, a public housing agency may require that any family not living within the jurisdiction of the public housing agency at the time the family applies for assistance from the agency shall, during the 12-month period beginning on the date of initial receipt of housing assistance made available on behalf of the family from such agency, lease and occupy an eligible dwelling unit located within the jurisdiction served by the agency. (ii) The Secretary may establish such exceptions to the authority of public housing agencies established under clause (i).