I think it is the Manx Government/tourism dept.
Don't quote me on that but I'm sure it is. Mind you, you now what would happen if they asked someone else to do it , the ACU would more than likely spit the dummy and call it a 'non recognised' event and anyone taking part would have their ACU licence removed, a bit like Spain? I think its Spain who don't let their riders do the TT isn't it?
The Manx Motorcycle Club would do a better job, they seem to do well at the MGP and thats basically the same isn't it?
As far as the off track stuff well I'm sure the Tourism dept could use someone in their realms to sort that, think of the money they would save!! I reckon after all the money they would save not paying the ACU they would deserve a nice LARGE LUNCH at the end of the fortnight :-)
Russ