I may be able to help a bit.
I think I would add that the term “undue hardship” would be defined by the courts over time through jurisprudence. Certainly the words themselves, their plain meaning, one would think would denote an exceptional circumstance and not a run-of-the-mill case. The test of undueness is by definition something that's outside of the ordinary. The requirement to provide reasons is one that I think is helpful as well, because it will allow the prosecutors to review the judge's reasons with a view to determining if the crown feels the judge has committed an error and to raising the issue with an appellate court.