Corporationing
Advertising and trading are being regulated for three reasons, to ensure: the Games have a consistent look and feel across London and the UK; that Games sponsors are able to achieve appropriate brand exposure and are protected against ambush marketing; that spectators and those participating in the Games can access venues easily and safely.
Anyone still naive enough to think the Olympic Games anything to do with sport should have a look at the maps here, and perhaps also take a look at the consultation documents. Be careful not to carry the wrong sandwich or bottled water and be sure to choose your t-shirt logo carefully.
The Department for Culture, Media and Sport. Part of your Government, working for you.