That is correct. The short story here is the FAA simply can't keep up with the innovation so they certify a group of people that can certify a repair as safe, and effective. It can than be used, while the FAA eventually full approves the change. The DER assumes full responsibility for the repair, and it's safeness. There have been stressful Christmas eves when approving the duct taping of a loose part of a V2500 so a plane full of troops can make it home for Christmas. Don't worry, it was a single flight one direction approval (but it happens all the time)