Denying access to multiple listing service unlawful

It shall be unlawful to deny any person access to, or membership or participation in, any multiple listing service, real estate brokers' organization, or other service, organization, or facility relating to the business of selling or renting housing accommodations, or to discriminate against a person in the terms or conditions of access, membership, or participation, on account of race, color, religion, sex, disability, familial status, or national origin.