I think the act in fact does that. Section 4, for example, refers to private interests and the public authority. It's simply leaving language that is instructive and value-based for the commissioner to interpret and apply, potentially using guidelines or scenario-based advice.
I'm convinced that the commissioner can do this and that it's much better to do this than to itemize nieces, but not nephews, or second cousins, but not third. The challenge is transparency for the people who are going to be governed by this. A minister has the right to know, when she's about to enter into some undertaking or transaction, whether she's caught by this or not.
So having an advice-giving function, having scenarios in which we can discern the commissioner's thinking on the bounds of private interest, is undoubtedly important. The legislation builds in common-sense exceptions. It's okay, for example, if something is going to benefit a whole region or all taxpayers or all users of public transit, while at the same time affecting you in a private sense.