(1) In general The Secretary shall periodically establish reasonable development cost limitations by market area for various types and sizes of supportive housing for the elderly by publishing a notice of the cost limitations in the Federal Register. The cost limitations shall reflect— (A) the cost of construction, reconstruction, or rehabilitation of supportive housing for the elderly that meets applicable State and local housing and building codes; (B) the cost of movables necessary to the basic operation of the housing, as determined by the Secretary; (C) the cost of special design features necessary to make the housing accessible to elderly persons; (D) the cost of special design features necessary to make individual dwelling units meet the physical needs of elderly project residents; (E) the cost of congregate space necessary to accommodate the provision of supportive services to elderly project residents; (F) if the housing is newly constructed, the cost of meeting the energy efficiency standards promulgated by the Secretary in accordance with section 12709 of title 42 ; and (G) the cost of land, including necessary site improvement. In establishing development cost limitations for a given market area under this subsection, the Secretary shall use data that reflect currently prevailing costs of construction, reconstruction, or rehabilitation, and land acquisition in the area. For purposes of this paragraph, the term “congregate space” shall include space for cafeterias or dining halls, community rooms or buildings, workshops, adult day health facilities, or other outpatient health facilities, or other essential service facilities. Neither this section nor any other provision of law may be construed as prohibiting or preventing the location and operation, in a project assisted under this section, of commercial facilities for the benefit of residents of the project and the community in which the project is located, except that assistance made available under this section may not be used to subsidize any such commercial facility.