I got to thinking about that. How about looking at it from the "other" way. Meaning, when a route goes up for bid for whatever reason(s) , the bid announcement states just WHO CAN bid on the route(s).Promoted to position. I know you’re saying no but where is the language?
Post the vacancy at the vacancy post office, including
stations and branches, for all regular rural carriers, sub-
stitute rural carriers, and rural carrier associates (RCAs)
with one (1) year of continuous service as an RCA. The
notice shall be posted for seven (7) calendar days
Now no, that doesn't say the PM can't but it does state specifically who can. And when you stated "transfer", I wasn't sure if you meant "from one office to another" or "just go back to their / a route within the same office". If from another office , the language in Article 12.2.C states "rural carrier". Again, looking at it from the way around.