RE: government support

Claudia, that's it!! You have identified the difference! A trade fair doesn't require / need official government recognition or participation -- a world's fair does!! See the rules and regulations in the protocol of the BIE, which can be found at http://www.bie-paris.org/main/index.php?p=5&m2=24

What does that mean with regard to your topic? We can discuss the answer in or after class tomorrow, OK?