Rules and regulations have changed. Back in the late seventies it was "there's the aeroplane, take it to XXXX and back, don't scare the passengers and don't scratch the paint". Nowadays, with the digital recorders almost to the point of noting how many times you pass wind during the ILS, most of my colleagues still working say it's a matter of trying to work through the library to remember which rule applies when, at the risk of no tea and biscuits.