Originally Posted by
Dash8widget
I think you have it backwards - the ability to turn your phone off for 9 hours is derived from the fact that long call reserves have until 3 hours prior to report to acknowledge an assignment. Not the other way around. There is actually nothing in our PWA that specifically says you can be out of contact for 9 hours when on reserve.
Of course the end result is the same

And, per ALPA, your interpretation is essentially correct.
However WSC does codify the 9 hour leash to check for a assignment and is binding and agreed to by both the company and the union.