An aircraft manufacturer develops a proposed CDL for a specific aircraft type and submits it to the responsible ACO for approval by engineering specialists. The ACO will then coordinate with the appropriate aircraft evaluation group (AEG) to resolve any problems and discrepancies prior to approving the CDL. For U.S.-certificated airplanes, the CDL, once approved, is incorporated into the limitations section of the airplane flight manual (AFM) as an appendix. For manufacturers outside the United States, the CDL may be a stand alone document and part of the Structure Repair Manual, or another manufacturer’s document. Some operators may choose to attach a copy of the CDL to their MEL for easy and ready reference by flightcrews.