Exclusive agency listings have an agreement with the listing broker as a non-agency representative of the house sellers. The MLS and Texas Real Estate rules require that you sign a listing agreement before we can list your property on the MLS.The MLS and Texas Real Estate rules require that you sign a listing agreement before we can list your property on the. MLS. No information is available for this page. Exclusive agency listing agreements are most often used with flatfee listing brokers who provide limited service to their clients.