; and (II) the term small area fair market rent means the fair market rent established for a ZIP Code area within a metropolitan area. (ii) Use of small area fair market rent Notwithstanding subsection (c) or any other provision of this subsection, not later than 3 years after the date of enactment of this subparagraph, the Secretary shall designate a number of metropolitan areas in which public housing agencies are required to use the small area fair market rent to determine the fair market rental for dwelling units for purposes of tenant-based assistance under this subsection that is not less than 3 times the number of metropolitan areas so designated in the final rule of the Secretary entitled Establishing a More Effective Fair Market Rent System