Great Scotch, no rules.

wherever you go there, there you are. If it's to be formal, be formal. If it's semi, go semi, if it's informal, relax. It's not that complicated.

If you're worried about the "rules", get the Geoffrey(tailor) brochure and go by that. Rules are what separates "sport" from "game" and "play". I'm not into dressing competitions, larking about is more my way.