I love seeing some of the advice non-company pilots give as if they had written the rules themselves. When I started at ASA, I was in CASS within the first week of indoc (a great perk that very few regionals give). The only stipulation is that you are NOT to J/S or non-rev on ASA, Delta, or any Delta Connector for the first 30 days, or else you will get fined ($150?). Other than that, if it is not painted up with Delta livery, feel free to attempt to jumpseat. After 30 days, you are encouraged to j/s on days off in ASA a/c to observe flows and procedures. Most captains are really cool and more than happy to help. I actually listed NRSA to fly home one weekend and the CA was standing at the desk. When he found out I was new, he told the gate agent to cancel the NRSA and put me in the JS. I have not finished training yet, but have j/s on several airlines and even more ASA flights. Have fun, go learn by doing, and use the flight bens. to make up for the low first year pay.