No. While listings that are displayed on the Internet must be submitted to the MLS and distributed to other MLS participants for cooperation, submitting a listing for cooperation within the MLS does not necessarily require that listing to be included in an MLS’s IDX display, if the seller has opted out of all Internet display. Per MLS rules, participants can work with their listing clients to determine an appropriate marketing plan, taking into account the client’s needs and full disclosure of the benefits to market exposure.