; or (B) less than 333 percent of average fair market rent in the county of the individual— (i) in the case of a household comprised of one individual, for an efficiency; and (ii) in the case of a household comprised of more than one individual, for a residence in which the number of bedrooms would not require— (I) more than two members of the household to share a bedroom; (II) children of different genders to share a bedroom with one another; or (III) a household member with a disability requiring medical equipment to share a bedroom. (3) Rural area The term rural area means a census tract that is— (A) outside of a metropolitan statistical area, as designated by the Office of Management and Budget; or (B) within a metropolitan statistical area, as designated by the Office of Management and Budget, that is outside of the metropolitan statistical area’s urbanized areas as designated by the rural-urban commuting area code 1 (as determined by the Secretary of Agriculture), and outside of tracts with a housing density of over 64 housing units per square mile located in the rural-urban commuting area code 2 (as determined by the Secretary of Agriculture). (4) Secretary The term Secretary means the Secretary of Housing and Urban Development. (5) Suburban area The term suburban area means a census tract with a population density of less than 2,500 inhabitants per square mile that is not a rural area. (6) Urban area The term urban area means a census tract with a population density of at least 2,500 inhabitants per square mile.