I am currently on layoff/vacation while I wait out my 5 days before I can start bumping into P.T. shifts. My Sup informs me that they need me to drive on Friday. Which means I'll be on layoff again next week, waiting for the 5 days to pass again. There are other drivers with less seniority who are on layoff as well, but have been bumping P.T. shifts already. Question(s): Am I allowed to defer the shift to a lower seniority driver in order to put myself into a position to start bumping into the P.T. shifts?