Thank you, Professor Russell.
Before I get to questions, I want to start by editorializing for a moment.
I agree with you that the courts are reluctant, with good reason, and we should be reluctant as well to give them political questions. Of course, the American Supreme Court actually has a doctrine regarding political questions, which they put in place following what was an ineffective attempt to force them to adjudicate the resolution to Dorr's Rebellion in the 1840s. I think their reasoning is wise.
I'm not sure I do agree with you on the example of the Balfour Declaration. I don't doubt that it was an agreement that was not legislated, but it only needed to have power for five years until the Statute of Westminster had gone through, unless I'm mistaken.