Leave wasn't "cancelled". People were asked to volunteer.
The rostering protocol needs to be embodied in the EBA and then it will be binding....as much as anything else is in an EBA.
Bonecollector, I am quite sure nobody has come out of the woodwork and shown anyone a better way to do the rostering. I belive you are being misled by someone. Are you confusing "help" with someone that barges in to the rostering area and demands to know why their roster doesn't contain all of their personal requests and points out how THEIR roster could have been better suited to their personal needs?