for what ever reason, there seem to be differences across the us
on your regular shift or working classification, anything over 5 hours a day, not 25 a week.
if you work another shift, but it is not your regularly scheduled shift, it starts over again
supposedly anything over 40 hours regardless of what shifts or job classifications you work should be ot, but i have seen too many exceptions to the 40 hour rule to believe that is the actual rule of thumb.
it is also interesting that a part timer in our building 6 years ago made over 75 grand.
one last thought. when filing on overtime issues, one of the issues you deal with is that the company does not have to offer you the extra work, they can hire outsiders to fill the shift. so if you press the ot while working outside of your job classification, you might find that you cut the extra time for everyone that is getting extra work and needs the extra time to survive. double edged sword.
d