The thing is, I don't think you could actually ever put a definition down there. You have to kind of just....
Anyway, I have some tests with respect to my act that I follow. They're quite clear, and they're out in my guidelines under the act. The thing is that these rules are largely in the act anyway, so I'm suggesting that some of them could be considered for the code as well.
I agree with you that in all these areas there's a certain level of interpretation that I have to apply, but what I do try to do is make public how I'm interpreting these things.
Of course, if there's any particular exception you want to put into your code, you're free to put them in.