This final rule applies the use of Small Area Fair Market Rents (Small Area FMRs) in the administration of the Housing Choice Voucher (HCV) program for certain metropolitan areas. This final rule provides for the use of Small Area FMRs, in place of the 50th percentile rent, the currently codified regulations, to address high levels of voucher concentration in certain communities. The use of Small Area FMRs is expected to give HCV tenants access to areas of high opportunity and lower poverty areas by providing a subsidy that is adequate to cover rents in those areas, thereby reducing the number of voucher families that reside in areas of high poverty concentration.