22 Tex. Admin. Code § 531.19
(a) No license holder shall inquire about, respond to or facilitate inquiries about, or make a disclosure of an owner, previous or current occupant, potential purchaser, lessor, or potential lessee of real property which indicates or is intended to indicate any preference, limitation, or discrimination based on the following:
Source Note:The provisions of this §531.19 adopted to be effective February 19, 1990, 15 TexReg 656; amended to be effective May 21, 2014, 39 TexReg 3855; amended to be effective May 25, 2022, 47 TexReg 3049.