Conversation with the Lord of the Worlds!

Imagine you had the opportunity to talk to your favorite celebrity or the President or the CEO of the biggest company in the world - how would you react? What is the protocol you would follow while talking to such a personality? Imagine someone briefs you on the protocol before the meeting - that you have to wear a certain dress-code, shake hands in a certain way, you're not allowed to ask certain personal questions, etc. If you refuse to follow this protocol, the meeting will be cancelled (invalid). These are the terms and conditions. How far would you go to make sure you comply?