Like I said, this is an abnormal definition of labor. It would mean, for example, that I am laboring 24/7, because there are some thing that my employment agreement does not allow me to ever do.
If you'd like to work under that definition of labor, that's fine, but then you cannot square it with an hourly-wage based definition of compensation for labor, so "time and a half for additional hour beyond 40" makes no sense in such a context.
I fully support people being compensated for such inconvenience. I don't think it makes sense to expect a greater-than-normal-work-time compensation for a lesser-than-normal-work-time inconvenience.