Article 38 Section 1 of the Master.
It is basically up to UPS and the local to work out any details. Sometimes a Regional Committee may get involved.
This is why there are many different rules that people have posted. It is all done locally and each local probably has it's own agreement where satellite routes exist.
See, I am in Central as well and any of our satellites are considered their own center even though they are merely a table with rollers that trucks back up to. I cannot understand why they will not let any of us bid the routes when they come open. According to the center manager, they will hire an off the street to fill that slot.
Just doesn't seem right that a newbie will get a bid route, be afforded 9.5 protection, not have to qualify in the same manner as the rest of us, and get their pick of vacation weeks. Our satellites have their work shuttled to them by another driver in a PC.