They have 18-24 months from the time the contract was ratified last year. So technically, I think they can get away with you moving for another 13 months.
Sorry to hear. Some guys at my building actually bid T-S routes and like it, but 95% have no desire to work weekends. Hopefully you can get back to M-friend soon.
All our schedules are locked. No more switching here. If you were M-friend and they need Saturday drivers it’s a sixth punch except for the ones who were already t-s.