(a) A person whose business includes engaging in residential real estate-related transactions shall not discriminate against a person in making a real estate-related transaction available, or in the terms or conditions of a real estate-related transaction because of race, color, religion, sex, disability, familial status, or national origin.
(b) As used in this section, “residential real estate-related transaction” means making or purchasing loans or providing other financial assistance:
(1) To purchase, construct, improve, repair, or maintain a dwelling;
(2) Secured by residential real estate; or
(3) Selling, brokering, or appraising residential real property.