This quest for knowledge was obviously posed by some blunty chisler with far, far too much time, and far, far too little to do.
It probably is laid down somewhere, bu in this day and age, I have neither the time or inclination to look it up, let alone post a thread to ask someone else.
If you can't dress yourself, and have so much time on your hands, disestablich your (presumably commissioned Flt Ops) post and go and waste an airlines oxygen.
Should this post cause offence, you know where to find me, as if I care.
WM