The National Association of Realtors board of directors on Friday approved a provision that allows Realtor-affiliated multiple listing services to ban members’ use of the terms “MLS” and “Multiple Listing Service” in Web site addresses, company names, e-mail addresses and in other marketing materials.A small group of MLSs has already passed such measures, and a policy adopted by the Regional MLS in Minnesota led to an antitrust lawsuit filed by several MLS members. That lawsuit was settled earlier this year. – Full Story