40 Tex. Admin. Code § 819.132
(a) It is unlawful to discriminate by refusing to sell or rent, or otherwise make unavailable, or deny a dwelling to a potential buyer or renter based on a disability of:
(b) It is 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 disability of:
(c) It is unlawful to make an inquiry to determine whether a potential buyer or renter of a dwelling, a person intending to reside in that dwelling after it is sold, rented, or made available, or any person associated with that potential buyer or renter has a disability. However, this section does not prohibit the following inquiries, provided they are made of each potential buyer or renter, whether or not the person has a disability:
Source Note:The provisions of this §819.132 adopted to be effective September 27, 2005, 30 TexReg 6065; amended to be effective June 16, 2014, 39 TexReg 4659.