In the central you get 10 calender days to file a grievance on discipline and 5 working days to file on anything non discipline. those days start counting from the time of knowledge and do not stop for days off, vacation etc. The company does have 10 calender days to discipline also from the date of knowledge. If you are on vacation they MUST give you the letter of discipline on first day back. If laid off the time does not stop counting.