N.D. Cent. Code § 14-02.5-08

A person may not deny an individual access to, or membership or participation in, a multiple-listing service, real estate brokers' organization, or other service, organization, or facility relating to the business of selling or renting dwellings, or discriminate against an individual in the terms or conditions of access, membership, or participation in the organization, service, or facility because of race, color, religion, sex, disability, age, familial status, national origin, or status with respect to marriage or public assistance.