A guide delivered to every household, "200 Questions on Visiting the Expo in a Civilized Way," published by Social Sciences Academic Press, is full of handy hints on how to look snazzy even if casual.
Rule 1, No pajamas in the street. Nope, not even for a quick run to the groceries. Pajamas are not to be worn outdoors.
There are also good tips on how to deal with different nationalities.
Canadians, for example, "are quite polite," and "warm and easy going." But it notes, they are also "a little bit conservative."
The booklet suggests that if you meet a Canadian, "It would be impolite to abruptly ask private questions about age, income, family status, marriage status, women’s weight, etc." But you can ask about economy and culture, the weather, sports, travel and folk art.
With Spaniards "Avoid talking about religion, family and work … Above all, do not criticize bullfighting." On the other hand: "Spaniards like to drink." As do Danes.
But what about the British. Bit restricted there: "Weather, history, architecture, and gardening are appropriate topics for a conversation with British. Do not involve topics like religion, politics and the Royal family."
Greeting Saudis is speficially mentioned and could, perhaps, be misunderstood.
"People of Saudi Arabia attach great importance to courtesy. When meeting them, address greetings first by saying "Hello" and then shake hands with a greeting to the body."
The Gazette tells us that as far as known no advice is given on how to deal with Australians. Perhaps none is needed.