(a) In order for a housing facility or community to qualify as housing for older persons under Sec. 100.304, at least 80 percent of its occupied units must be occupied by at least one person 55 years of age or older.
(b) For purposes of this subpart, occupied unit means:

(a) The provisions regarding familial status in this part shall not apply to housing intended for, and solely occupied by, persons 62 years of age or older. Housing satisfies the requirements of this section even though:

(a) Covered multifamily dwellings for first occupancy after March 13, 1991 shall be designed and constructed to have at least one building entrance on an accessible route unless it is impractical to do so because of the terrain or unusual characteristics of the site.

(a) It shall be unlawful for any person to refuse to permit, at the expense of a handicapped person, reasonable modifications of existing premises, occupied or to be occupied by a handicapped person, if the proposed modifications may be necessary to afford the handicapped person full enjoyment of the premises of a dwelling.