International Jumpseat
AV8OR,
It's not that the TSA does not care, it is that UPS and FedEx choose not to exercise a security program that is in place to allow offline international jumpseaters on your freighters. There are several companies (Kalitta, Polar, Atlas, Southern, et al.) that utilize this authorization, and they are FAR 121 carriers.
The pax carriers are a different story. CASS is a domestic-only program at the moment, thus the JSCs are correct, you cannot fly in the cockpit of a pax carrier internationally via CASS. You CAN, however, fly on the above-mentioned cargo carriers because they employ a system, approved/enforced by the FAA and TSA contained within the cargo carrier's AOSSP, that allows them to do this. Since the entire aircraft is considered the cockpit due to the lack of the fortified cockpit doors, such personnel as couriers, animal handlers, contract maintenance, etc would be unable to fly without it. Therefore, to enable these carriers to provide the security necessary to protect the flight crew personnel and payload from any "issues", this program was put in place many moons ago to keep the jumpseat open. CASS makes life much easier in assisting/expediting the required background checks for each crewmember performed before they can ride. FedEx and UPS certainly have the ability to participate, but it is up to those respective companies to exercise the option. Your JSC is familiar with this.
Hope this clears things up.
flynfr8