I've got my own standards for this one:

Formal=Kilt hose & Ghillie Brogues

Semi-Formal=Kilt hose & Nice Dress Shoes (clean and shiny) Brown Belt sporan and shoes or All black, whichever goes best.

Casual=Boots and folded down heavy woven socks, Mid rise boots are acceptable. Also must be worn with casual shirts which includes anything with pictures, numbers or advertising on it.

Hot=No shirt, no shoes, any sandals, surfer trunks under Kilt ready to swim in 20 seconds