The fair housing act doesn’t stop age discrimination, it protects “familial status” meaning they can’t discriminate based on a family having children, or being in a gay or lesbian relationship. It does have three exceptions to the law and they all center around senior communities.

1. Every occupant is 62 or older. (Why 62 I have no idea.)
2. Every household has 1 person who is 55 or older.
3. The community is part of a state or federal housing program that assists elderly people.