Brought to my attention: There is a Parttime shifter who reports to his PT shifting bid on a daily basis but soon after 3-4hours after he started shifting he clocks out ealry to go drive for the pkg centers as an exception air driver? Is this PT employee allowed to do this. Leave his bid job and go drive? Where does it allow him to drive air in the contract? Also can a combo air driver who wants extra work on a saturday(6th day) bump this PT exception air driver on his scheduled day off work?