I think he makes them up as he goes along.

As was demonstrated on the Mike Harding show, where in effect he said that sessions where no payment was involved would have no problems, it seems that anytime he is asked about a situation where the Bill, as it exists at present, would cause unreasonable restrictions, he says that that particular activity is not going to be hit.

I think these should be treated as promises that he will be introducing clauses in the "exceptions" part of the bill which will ensure that this is the case, and attempts made to hold him to these verbal pledges.