Various Models
Constitutions with a high degree of separation of powers are found worldwide. The UK system is distinguished by a particular entwining of powers. In Italy the powers are completely separated, even if Council of Ministers need the vote of confidence from both chambers of Parliament, that's however formed by a wide number of members (almost 1,000). A number of Latin American countries have electoral branches of government.
Countries with little separation of power include New Zealand and Canada. Canada makes limited use of separation of powers in practice, although in theory it distinguishes between branches of government. New Zealand also subscribes to the principle of 'Separation of Powers' through a series of constitutional safeguards. The Executive requires regular approval from the Legislature to carry out decisions. The Mixed Members Proportionate framework also caters for a coalition of parties to form government where a majority from a single party does not exist. The Judiciary is also free of government interference. If a series of judicial decisions result in an interpretation of the law which the Executive considers does not reflect the intention of the policy, the Executive can change the legislation. However, they can not direct or request a judicial officer to revise or reconsider a decision. These decisions are final. Should there be a dispute between the Executive and Judiciary, the Executive has no authority to direct the Judiciary, or its individual members.
Complete separation-of-powers systems are almost always presidential, although theoretically this need not be the case. There are a few historical exceptions, such as the Directoire system of revolutionary France. Switzerland offers an example of non-Presidential separation of powers today: It is run by a seven-member executive branch, the Federal Council. However, some might argun constitution, the Australian constitution does define the three branches of government separately, and this has been interpreted by the judiciary to induce an implicit separation of powers. State governments have a similar level of separation of power, but this is generally on the basis of convention, rather than constitution.
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