Unless the cba requires equalization of overtime and no right to refuse overtime, op may be the one picking up the overtime every time.
If i am working 1st shift and a person on 2nd shift calls out (any reason not coming to work) then if no volunteers I have to stay to cover that position. If i can contact the person working that job on 3rd shift and they agree to come in early then i can leave when they arrive. usually 4hr even split. so if somebody lays out in between my normal work time i could possibly get callef in.
So there is at least one person from 3 crews that gets affected, and people move up and down on particular job based on people bieng on vacation or training etc.
So due to the senority and the job ladder the same group of people are forced to stay over or come in early each week.
you have the option to not come in early if you dont want to, but that same person may do the same the next time you ask them. if you camnot find a qualified relief you end up working 16hrs straight.
Doesn't change anything.
Two things I am tired of typing: 1.) A wrongful termination does not mean that you were fired for something you didn't do; it means that you were fired for a reason prohibited by law. 2.) The above answer, whatever it is, assumes that no legally binding contract or CBA expressly says otherwise. If it does, the terms of the contract apply.