Well I can't do that, and at this point neither can anybody else since the proposed rule hasn't even come out yet. The reason I THINK that over 60 ropes will be able to move back up is because the FAA and the unions are mostly considering major PASSENGER airlines as they contemplate this rule change. So when they say there won't be any way for someone over 60 to come back its because in their mind that person has RETIRED.
That is going to be a sticky issue and in order to eliminate some of the many lawsuits sure to be attempted by over 60 retirees, they say there will be language to prevent that from happening.
So, unless the Administrator and all the other suits pushing for this change are smarter than I give them credit for, they have simply (for now) overlooked the fact that there are in fact several hundred (if not thousands) of over 60 pilots flying for part 121 carriers who HAVE NOT retired. I don't know how you could prevent them from coming back to a flying seat unless you are able to negotiate something different through the CBA.
Again, I HOPE that I am wrong, and the Administrator and folks on the change committee ARE aware of all these over 60 guys who haven't retired yet and are still specifically preventing them from returning to a flying seat.
That will be a hard fought battle I am sure, and ANYBODY that purports to know the answer to your question is full of something brown. There will be all kinds of speculation in advance of a change on that very issue, but we won't know how it will shake out until the rule is published, the suits have a chance to negotiate the change, and the lawyers get the chance to make millions in fees telling us what the law really meant to say.
Of course these are just my opinions.
FJ