I was used to work the twilight shift, where I was already approved for my vacation. I just started cover driving recently and I was wondering if I lose my approval on the days I originally asked for since I am now lower in seniority.?
I have switched many times and never lost vacations. However, you probably want to ask the driving steward since this may be determined by local practice.
It varies...
Where I am, if you go full time you re-pick your weeks which you'll still get the part time number of hours, at your present rate.
Or paid out, if the manager thinks he can get away with it.