diversions: defence expo dress codes

So I'm horrifying myself looking at DefExpo India, a huge arms fair on in New Delhi this week. On the rules and regulations page:

Dress code : The Organisers reserve the right to determine whether the attire of the Exhibitor is acceptable, and is in keeping with the best interest of the exposition, All Exhibitors are expected to be dressed formally in safari suit, national dress, lounge suit or service uniform.

Just what is a formal safari suit? I would have thought the shorts were a bit casual, myself. And I wonder about the definition of a lounge suit; are crocodile skin lapels acceptable?

The mind boggles, but it was doing that at the concept of price comparison on heavy artillery anyhow.