You might be talking about something that might be considered "local usage" and not something that all Gieves customers or all army officers did. If you look at pictures of groups of army officers, university students, politicians, lawyers, businessmen, clergy, clerks, (or almost anyone else), from before the invention of the internet you see all sorts of ways of wearing clothing. Then the internet came and people began propagating their own "local usages" as "rules". The recent series of photographs of British dukes shows that they still enjoy the freedoms that all men once had. I am hoping that someday, the "rule makers" of the internet restore to all mankind the freedoms that they once had. I believe that all men, not only Prince Michael Of Kent, should have the freedom to tie their neckties anyway that they want. For those out there in cyberspace (many of whom never post pictures) who want a "rule", I propose only one "rule", don't put your trousers on over your head with the empty legs hanging down like doggie ears, as your vision will be impaired and you will look silly.