Given that you work in a unionized environment, you must have a CBA somewhere, right? Read up on the rules yourself, and be ready to ask your union steward for clarification. Don't forget that if you disagree with what your steward says, you can also grieve the decision and have the case taken to the higher up.
But be mindful of how your relationship with the old fart coworker will go. But if the senior old fart is doing this to you first, I don't see any reason why you can't play by the book either.
-Lik |