If any family resides in a dwelling unit in a building purchased by a resident management corporation, and the family decides not to purchase the dwelling unit, the Secretary shall offer to provide to the family (at the option of the family) tenant-based assistance under section
1437f
(o) of this title for as long as the family continues to reside in the building. The Secretary may adjust the payment standard for such assistance to take into account conditions under which the building was purchased.