Here, if they've never driven a package car, the company has to train them:
A laid off tractor-trailer driver who has never driven a package car
or route shall be considered not qualified as a package driver. Such
tractor-trailer driver will be trained to be a package driver. If more
than one tractor-trailer driver is laid off the senior laid off tractor-trailer
driver will be trained first. When that training is finished, the
next most senior tractor-trailer driver on layoff will be trained. This
training will occur provided the laid off tractor-trailer drivers have
more seniority than package drivers still working in the center.