The Buck Stops Here

After becoming the branch librarian, it didn't take long for me to realise that I am the last stop. I make decisions on everything from deciding if a fine is to be waived to whether or not to open the lobby bathrooms. Do we go through someone's bag when they set the security alarm off? What if they're in a wheelchair? When a computer doesn't work do I call the help desk, someone in particular or just shut it off for a couple of minutes? When the LA's are bickering do I get involved or keep walking? When everyone puts in for vacation time do I schedule everyone off but then take mine first?