What is cabinet confidentiality?  How does it restrict what a minister of the Crown can reveal in public discourse?  How can a court, tribunal or parliamentary committee compel disclosure, and how can that process be blocked? Cabinet confidentiality is a feature of Canadian constitutional law derived from Part III of the Constitution Act, 1867, in which Executive Power was modeled after the government of the United Kingdom and inherited from the U.K. Crown.  U.K. government by cabinet is based on collective responsibility.  All ministers, including the prime minister, are responsible for cabinet decisions and the legislative agenda tabled in parliament.  Every…