PAX packages and CAO packages may appear on the same Declaration (See 126.96.36.199.1). The “Passenger and Cargo Aircraft” Box needs to be crossed out. Do not put the CAO label on PAX packages. Watch for Operator Variations as some carrier stipulates to separate CAO packages from PAX packages. As for radioactive material, per 188.8.131.52, you must not mix Non-Radioactive Material and Radioactive Material on the same declaration except for Dry Ice.