30.2.D.3.E: offered by local continuous service among relief carriers, aka seniority, but again, because of ambiguous contract language, just because for some reason some relief carrier has more seniority when it comes to bidding, they may not have the longest continuous service as its defined in this section (eg, TRC time in the same office would count) and a more junior relief carrier could have priority over the more "senior" carrier who turned into an RCA before the less senior, but longer server relief carrier.
The regular might be on "extended absence". The union appeals process can be very untimely, so I wouldn't make plans to shuffle just yet. Until the exiting carrier is officially not assigned to the route, the route is not vacant.
We have had a "vacancy" stretch out beyond 3 years because a settlement couldn't be reached with a carrier that was never carrying again due to workplace injury. We also had required route adjustments held up because of that not vacant route being substantially affected. And because route adjustments couldn't be done, other routes couldn't be posted, and until the routes posted, we had relief carriers carrying as if a regular for years, and because relief carriers were working as if regulars, we weren't allowed to hire more relief carriers (back when people wanted this job). It was a mess. Eventually they got a ghost route assignment for that carrier that was otherwise in postal limbo, and the dominos started to fall.