I think the most important part of this email is the acknowledgement that they expect all current CJO's to expect a date at some point in 2014. The flows will reset/start over again in January 2015, and anyone not in class by the end of 2014 might have problems with the 18 month expiration date.

I read this that Delta is aware of the expiration date and that they don't expect it to be an issue - which is a reassuring thing for those in the pool.