There are proscribed standards that should be followed in this sort of situation, and the regulatory authority is the agent responsible for proscribing them. Usually they are what ICAO has recommended/required as a standard.
Management/the aerodrome license holder should have an interest in making sure these standards are followed. If they ain't, you have a bit of a problem.
First, you need to find out what the applicable standard is, so you can be sure of your ground if you ever have to argue it out.
Then it's your choice as to how to apply it.
I don't have to engage the cynical centre/right-brain to tell you that if it all goes wrong one day, no matter what the "custom" is, someone will be looking for someone else to hang.
So, "someone-else", what're ya going to do?
If it was me in your shoes, my first approach might be to ask the union, maybe the technical director (if you have one, or an equivalent.)