Big Package
Handler
There is language concerning health and safety.... if you feel fatigued you can just say you feel fatigued and consider your self a hazard, thus you can't work.
I was very sick at a certain period this year and I don't know if they didn't believe me or what, and I even worked sick enough to have to run out back and puke a few times. Eventually they started progressive discipline for missed. I had such a hard time breathing that I quit smoking.
I called my BA and said my doctors notes for pneumonia, a sinus infection and the flu weren't good enough for them. My steward and I sat down with management and all of the days were changed from missed. Back in my day we used to thank people in manual labor for working through bad health shjt even if it meant a day or two for a bit. All absences for the doctor notes time period were removed, concluded it was unsafe for me to work.