S.C. Code Ann. § 31-21-50: Discrimination in relation to membership or participation in multiple listing service, real estate brokers' organization, or related service, organization, or facility.

It is 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 dwellings or to discriminate against him in the terms or conditions of the access, membership, or participation on account of race, color, religion, sex, handicap, familial status, or national origin.