Subject only to provisions of this section and notwithstanding any other provision of law, a public housing agency for which a plan under subsection (d) is in effect may provide public housing projects (or portions of projects) designated for occupancy by (A) only elderly families, (B) only disabled families, or (C) elderly and disabled families.

In determining priority for admission to public housing projects (or portions of projects) that are designated for occupancy as provided in paragraph (1), the public housing agency may make units in such projects (or portions) available only to the types of families for whom the project is designated.

If a public housing agency determines that there are insufficient numbers of elderly families to fill all the units in a project (or portion of a project) designated under paragraph (1) for occupancy by only elderly families, the agency may provide that near-elderly families may occupy dwelling units in the project (or portion).