part time air exception driver

Does anyone have the old contract from 1990-1993 that states combo jobs are for part time air drivers to become full time?

Help! Trying to figure out what a PT air/exception driver is paid if they drive a full ground route then work the local sort, fill in at customer counter and/or drive an air pickup route all in the same day. I have read that it is called relief driving, flex driving and/or air-to-ground and I...