Fair Housing Act (Title VIII of the 1968 Civil Rights Act, with amendments issued through Sept. 1988)

(k) "Familial status" means one or more individuals (who have not attained the age of 18 years) being domiciled with-- 

(1) a parent or another person having legal custody of such individual or individuals; or 

(2) the designee of such parent or other person having such custody, with the written permission of such parent or other person.

The protections afforded against discrimination on the basis of familial status shall apply to any person who is pregnant or is in the process of securing legal custody of any individual who has not attained the age of 18 years.