Just to point out, at Oxford when entering the examination schools, if you were wearing the wrong colour socks, so we heard, then one of the officials at the door would state that if you turned up in the afternoon wearing them, you would be refused entry.
And whilst I was at my graduation ceremony, a middle-aged chap was desperately changing his black bow tie for a white one, worried he had misunderstood the meaning of 'black tie', as opposed to 'white bow tie'. Oh, and let's not get started on the who can wear their 'mortarboard', and who has to use it as a pencil case..............
Which brings me to the main point. During school or university exams, we now have pretty stringent rules as regards what can be bought into the exam room as regards pencil cases, mobile phones, smart watches, random electronic devices etc etc. So, an ability to follow written rules and prescriptions however insane they may seem can sometimes be useful. If the rules are clearly stated, whether that is academic dress, what you should and shouldn't do in an exam room, or what you can and cannot take onto a plane or in your luggage, sometimes it just makes everyones life a bit easier if you just follow the rules......................
(Mind you, I still don't forgive the new and inexperienced teacher who gave me my one and only detention for not having my name tape sewn into my spare socks................)