R.I. Gen. Laws § 34-37-5.2
It shall be unlawful to deny any person who meets licensing and other non-discriminatory requirements that are also applied to other applicants and members access to, or membership or participation in, any real estate listing service, real estate brokers' organization, or other service, organization, or facility relating to the business of selling, leasing, or renting a housing accommodation or to discriminate against him or her in the terms or conditions of the access, membership, or participation on account of race, color, religion, sex, sexual orientation, gender identity or expression, marital status, military status as a veteran with an honorable discharge or an honorable or general administrative discharge, servicemember in the armed forces, country of ancestral origin, disability, age, or familial status.
R.I. Gen. Laws § 34-37-5.2