The patch does NOT mention the FAA -- this is a very common misconception. The approval is
granted by the FAA, which mandates that the label have the following wording:
Conforms To:
PAT NO.
STC STO10781LA
APPROVED FOR AIRCRAFT
USE ONLY
It is suggested that you go to the following link on the CAReS mfr. website and print out the FAA advisory circular that explains the approved use, and take that with you. http://www.kidsflysafe.com/how-to-use-cares/in-flight-documents
(I did not link the FAA document itself because these can be updated at any time, so you will want to follow the link to one that is current; it is best to print it out just before your departure so that you are sure that it is current at the time of your flight. With my carseat, I tape an envelope to the back containing these documents; with a cares I'd probably tuck a copy inside the carrying pouch.)