That rarely, if ever, happens.
I'm just giving you a policeman's perspective. Sometimes we're challenged by the fact that in 10 seconds we have to think about every law that's going to be brought up before the court and then we will be scrutinized before the court for hours on what they assume we should have known. My job is not to be an expert on the charter. My job is 10 (a) and 10 (b): make sure they get it; make sure they can contact a lawyer in the language of their choice; and after that, have a good day.