To the extent that amounts are made available for providing service coordinators under this section, the Secretary shall require owners of covered federally assisted housing projects (as such term is defined in subsection (d)) receiving such amounts to provide for employing or otherwise retaining the services of one or more individuals to coordinate the provision of supportive services for elderly and disabled families residing in the projects (in this section referred to as a “service coordinator”). No such elderly or disabled family may be required to accept services.