24 CFR §100.202

1. (a)It shall be unlawful to discriminate in the sale or rental, or to otherwise make unavailable or deny, a dwelling to any buyer or renter because of a handicap of—
   1. (1)That buyer or renter;
   2. (2)A person residing in or intending to reside in that dwelling after it is so sold, rented, or made available; or
   3. (3)Any person associated with that person.
2. (b)It shall be unlawful to discriminate against any person in the terms, conditions, or privileges of the sale or rental of a dwelling, or in the provision of services or facilities in connection with such dwelling, because of a handicap of—
   1. (1)That buyer or renter;
   2. (2)A person residing in or intending to reside in that dwelling after it is so sold, rented, or made available; or
   3. (3)Any person associated with that person.
3. (c)It shall be unlawful to make an inquiry to determine whether an applicant for a dwelling, a person intending to reside in that dwelling after it is so sold, rented or made available, or any person associated with that person, has a handicap or to make inquiry as to the nature or severity of a handicap of such a person. However, this paragraph does not prohibit the following inquiries, provided these inquiries are made of all applicants, whether or not they have handicaps:
   1. (1)Inquiry into an applicant's ability to meet the requirements of ownership or tenancy;
   2. (2)Inquiry to determine whether an applicant is qualified for a dwelling available only to persons with handicaps or to persons with a particular type of handicap;
   3. (3)Inquiry to determine whether an applicant for a dwelling is qualified for a priority available to persons with handicaps or to persons with a particular type of handicap;
   4. (4)Inquiring whether an applicant for a dwelling is a current illegal abuser or addict of a controlled substance;
   5. (5)Inquiring whether an applicant has been convicted of the illegal manufacture or distribution of a controlled substance.
4. (d)Nothing in this subpart requires that a dwelling be made available to an individual whose tenancy would constitute a direct threat to the health or safety of other individuals or whose tenancy would result in substantial physical damage to the property of others.