The Realty Alliance, a network of 60 real estate companies whose members include HomeServices of America Inc., is urging the National Association of Realtors to repeal a policy that allows national franchisors to index property listings displayed on their affiliated brokers’ websites.

NAR’s board of directors approved the new policy — which greatly expands the pool of listings national franchisors are able to display on their consumer-facing websites — at the group’s annual meeting in November.

Supporters of the policy change included Realogy Franchise Group, parent company of Century 21 Real Estate, which in January announced it was the first national real estate franchisor to implement indexing and display of Internet Data Exchange (IDX) listings.

Before the change was approved, brokerages entering into IDX reciprocity agreements could display the listings of other participating brokers in their market on their own websites, but they could not share other brokers’ IDX listings with their franchisor.