Request to Establish ECO or CMG Constituent Status
Submit this form to register an X12 member or non-member's interest in being recognized as a constituent of the External Code Organization (ECO) or as a constituent of a Code Maintenance Group (CMG) with a commitment to active participation. For more information, see External Code List (CAP12). For X12 members, the form must be completed by the X12 member's primary representative.