I experienced this "move a monitor" scenario myself whilst I was working at a DoD contractor company. I had to move cubicles and moved my stuff myself. My boss noticed and told me I couldn't move my monitor or docking station... but everything else I could. So I had to move my monitor and docking station back down to my old cubicle so that a few days later the "correct people" could move the items back up for me.
Why is this a union thing? No idea. Is it real? Yes.
Perhaps somebody is enjoying some popcorn watching an unending battle between "the invisible hand of the free market" and "an invisible union".