When is runner ejected?

[CecilOne]

I think what we are saying is that if the OBS occurred before the USC, the run would score except under the new ASA rule (USC ejection = immediate out).

Then, if the contact also caused the fielder being unable to get another runner out, the contact is INT and
under most rules:
- the runner is out
- any other runners are returned to LBO
or under the new ASA:
- the other runner closest to home is out
- any other runners are returned to LBO
I'm not sure what the "more than half-way" applies to.

The ejection after the game ends is a separate question and can be done until the umpire jurisdiction ends.