Originally Posted by rickair7777

The CA always has final say on on a JSer, CASS or not. He might end up having to explain himself if he denies too many, or the wrong, JSer.

If there are seats in the cabin, and the JSer is employed by YOUR AIRLINE ONLY he may sit in the actual if he and the CA so desire. The TSA requires offline (including codeshare) JSer's to sit in the cabin if a seat is available. Your CA does not technically have the authority to allow those folks in JS if there's room in back.

If it were me, I'd say hi to both pilots, and most everybody does.