Originally Posted by
Gajre539
It is my understanding that an ATP written is valid indefinitely for upgrade at a 121 carrier ONLY if the written is taken by the pilot while employed at a 121 carrier. Did the rules change?
No the rules didn't change, there never was such a rule. That's a common myth but not true.
If in doubt go read the relevant section of the FARs...apply it literally, exactly as it is written. The reg that allows use of an expired ATP written in 121 has no caveats at all.