Separation of Powers: India, UK, USA and France

The doctrine of separation of powers holds that the three functions of government – legislative, executive and judicial – should be exercised by separate organs, so that no single body holds all the power, thereby preventing tyranny and protecting liberty.

Three aspects (M.J.C. Vile, Constitutionalism and the Separation of Powers, 1967): separation of functions, separation of personnel, and checks and balances. Vile described the doctrine as a "pure doctrine" and noted that no system implements it fully.

Evolution of the doctrine:

• Aristotle: three elements of a constitution – the deliberative, the magisterial (executive) and the judicial.

• John Locke (Two Treatises of Government, 1690): legislative, executive and federative (foreign affairs) powers; judiciary was not separately recognised; supremacy of the legislature.

• Montesquieu (The Spirit of the Laws, 1748), based on his study of the English constitution: legislative, executive and judicial powers. "When the legislative and executive powers are united in the same person, or in the same body of magistrates, there can be no liberty." Also, there is no liberty if the judicial power is not separated from the legislative and the executive. Montesquieu misread the English system, which then had a fusion rather than strict separation.

• William Blackstone (Commentaries on the Laws of England): linked separation to liberty.

• James Madison (Federalist Papers Nos. 47 and 51): The accumulation of all powers in the same hands "may justly be pronounced the very definition of tyranny"; he explained that the Constitution has partial agency, not complete separation, with checks and balances ("ambition must be made to counteract ambition").

• Ivor Jennings: distinguished the pure doctrine from the functional view and observed that in the UK there is no strict separation.

• Contemporary views: Bruce Ackerman's critique of the American separation of powers ("The New Separation of Powers", 2000) advocated a parliamentary model with independent "integrity branch" and "distributive branch"; Eoin Carolan and Jeremy Waldron have analysed the doctrine in a modern sense.

Related concepts:

• Checks and balances: the mechanisms by which each branch limits the others (veto, judicial review, impeachment, confirmation).

• Fusion of powers: typical of parliamentary systems.

• Delegated legislation and administrative adjudication: common challenges to strict separation.

• Independence of the judiciary is the most universally accepted core of the doctrine.

The American model is the closest to the textbook doctrine, but is better described as "separated institutions sharing powers" (Richard Neustadt). Article I vests legislative power in Congress, Article II executive power in the President, and Article III judicial power in the Supreme Court and lower federal courts.

Separation of personnel: the Incompatibility Clause (Article I, Section 6) – no person holding an office under the United States may be a member of Congress.

Checks and balances (examples):

• President's veto over legislation (overridden by two-thirds of both Houses); Senate's advice and consent to appointments and treaties; impeachment by the House and trial by the Senate; Congress's control over appropriations; judicial review (Marbury v Madison, 1803) over both Congress and the President; presidential nomination of federal judges (with Senate confirmation) and life tenure of judges during good behaviour.

Landmark cases:

• Marbury v Madison (1803): judicial review of legislation established.

• Myers v United States (1926): President's removal power over executive officers.

• Humphrey's Executor v United States (1935): Congress may limit presidential removal of members of independent regulatory commissions.

• Panama Refining Co. v Ryan and A.L.A. Schechter Poultry Corp v United States (1935): applied the non-delegation doctrine (invalidating excessive delegation of legislative power).

• Youngstown Sheet & Tube Co. v Sawyer (1952): the steel seizure case – President Truman could not seize steel mills without congressional authority; Justice Jackson's three-category concurrence on presidential power (maximum authority when acting with Congress's authorisation; a "zone of twilight" when Congress is silent; lowest ebb when acting against Congress's will).

• United States v Nixon (1974): executive privilege is not absolute; the President must comply with a judicial subpoena in a criminal trial.

• Morrison v Olson (1988): upheld the independent counsel statute.

• INS v Chadha (1983): a one-House legislative veto is unconstitutional (violates bicameralism and presentment).

• Clinton v City of New York (1998): the Line Item Veto Act was held unconstitutional.

• Mistretta v United States (1989): upheld the Sentencing Commission and delegation to it (the "intelligible principle" test).

• Recent developments: Loper Bright Enterprises v Raimondo (2024) overruled the Chevron deference doctrine, shifting interpretive authority from agencies to courts; Trump v United States (2024) addressed presidential immunity from criminal prosecution for official acts.

The UK has a fusion of powers, not a strict separation. The doctrine operates mainly as a principle of judicial independence and mutual restraint.

• Executive and legislature: The Prime Minister and ministers must be members of Parliament; the Cabinet is drawn from and responsible to the House of Commons. This is the core of Bagehot's "close union, the nearly complete fusion" of executive and legislature.

• Judiciary and legislature: historically, the House of Lords was both the upper chamber of the legislature and the highest court (through the Law Lords). Under the Constitutional Reform Act, 2005, a Supreme Court of the United Kingdom was created and began functioning in October 2009, separating the final court of appeal from Parliament.

• Lord Chancellor: formerly head of the judiciary, a Cabinet minister and Speaker of the House of Lords (all three roles). The 2005 Act changed this: the Lord Chief Justice became head of the judiciary of England and Wales; the Lord Chancellor's role was reformed, and a Speaker of the House of Lords was introduced. A Judicial Appointments Commission now handles appointments.

• Judicial independence: guaranteed by the Act of Settlement, 1701 (security of tenure for judges during good behaviour) and statutory protections; judges can be removed only by an address of both Houses.

• Parliamentary sovereignty (Dicey) means Parliament can make or unmake any law; courts do not review the validity of Acts of Parliament (though they may issue declarations of incompatibility under the Human Rights Act, 1998, s 4).

• Cases:

  • Duport Steels v Sirs (1980) – Lord Diplock: "Parliament makes laws, judges interpret them"; the constitutional principle of separation of powers is "a cardinal feature of the British constitution".

  • M v Home Office (1994) – courts can hold a minister in contempt.

  • R v Secretary of State for the Home Department, ex p Fire Brigades Union (1995) – the executive cannot frustrate Parliament's statutory intention using prerogative powers.

  • R (Miller) v Secretary of State for Exiting the EU (2017) – the government cannot trigger Article 50 using the royal prerogative without parliamentary authorisation.

  • R (Miller) v The Prime Minister; Cherry v Advocate General (2019) – the advice to prorogue Parliament was unlawful, as it frustrated Parliament's constitutional function.

  • Anisminic v Foreign Compensation Commission (1969) – courts will not accept an ouster clause that stops review of errors of law.

• Delegated legislation: large in volume; Henry VIII clauses and the Statutory Instruments Act 1946 exist; the Donoughmore Committee (1932) examined the powers of ministers.

France is the home of Montesquieu, but its model of separation is distinctive: the traditional emphasis is on the separation of the administration from the ordinary judiciary, not on separation between judiciary and the legislature.

• Declaration of the Rights of Man and of the Citizen (1789), Article 16: "A society in which the guarantee of rights is not assured, nor the separation of powers determined, has no constitution at all."

• Law of 16–24 August 1790: prohibits ordinary judges from interfering with the operations of the administration. The result is a dual court system: ordinary (judicial) courts headed by the Court of Cassation and administrative courts headed by the Conseil d'État, with the Tribunal des conflits deciding jurisdictional disputes. This system is called droit administratif.

• Historic distrust of judges: because of the pre-Revolutionary parlements; Édouard Lambert's Le gouvernement des juges (1921) criticised judicial power; judges were long limited to applying law rather than reviewing it.

• Fifth Republic (1958): a strong executive with a "rationalised parliamentarism". Article 34 lists areas in which Parliament legislates (the domaine de la loi), and Article 37 gives the residual field to executive regulation (pouvoir réglementaire autonome) – a dramatic reversal of parliamentary supremacy. Article 16 gives the President emergency powers; Article 49(3) allows the Government to pass a bill without a vote unless a motion of censure is passed; the executive can legislate by ordinances (Article 38) with parliamentary authorisation; the President can dissolve the National Assembly (Article 12).

• Constitutional Council (Conseil constitutionnel): reviews the constitutionality of laws; its 1971 Freedom of Association decision gave constitutional force to the Preamble (rights); the 2008 reform introduced QPC (question prioritaire de constitutionnalité), an ex post review through a priority question raised in litigation.

• Judicial independence: guaranteed by the President acting with the Conseil supérieur de la magistrature.

• Features: President and Prime Minister (semi-presidential); ministers are not allowed to simultaneously serve as members of Parliament (Article 23) – a stronger separation of personnel than in the UK.

The Indian Constitution does not expressly adopt the doctrine, but a functional separation exists with checks and balances, and the Supreme Court treats the doctrine as part of the basic structure.

• Textual indications: Article 50 (Directive Principle – State to separate the judiciary from the executive in public services); Articles 53 and 73 (executive power); Article 79 (Parliament); Article 121 and 211 (no discussion in Parliament or legislatures on the conduct of judges); Article 122 and 212 (courts cannot inquire into parliamentary proceedings); Article 124 and 217 (independent judges, removal by a special procedure); Article 361 (immunity of the President and Governors).

• Fusion in a parliamentary system: ministers are members of the legislature (Article 75, 164) – as in the UK.

• Overlaps and checks: ordinance-making power of the President/Governor (Articles 123, 213); delegated legislation; tribunals; legislative power to validate invalid laws (but not to overrule judicial decisions directly); impeachment of the President (Article 61) and removal of judges (Article 124(4)); judicial review of legislative and executive action (Articles 13, 32, 226); the Rajya Sabha and the Lok Sabha controlling executive through questions, no-confidence motions and committees.

Leading cases:

• In re Delhi Laws Act (1951): a legislature cannot delegate its essential legislative functions; permissible delegation is limited to ancillary functions.

• Ram Jawaya Kapur v State of Punjab (1955): Chief Justice Mukherjea held that the Indian Constitution has not recognised the doctrine of separation of powers in its absolute rigidity, but the functions of the different parts or branches of government have been sufficiently differentiated. Hence, the executive cannot assume the functions of other organs essentially belonging to them (a classic exam citation).

• Golaknath v State of Punjab (1967): and Kesavananda Bharati v State of Kerala (1973): the separation of powers is a basic feature.

• Indira Nehru Gandhi v Raj Narain (1975): the Thirty-ninth Amendment (taking the election of the Prime Minister beyond judicial scrutiny) was struck down as violating the separation of powers, as it amounted to the exercise of a judicial function by the legislature.

• Minerva Mills v Union of India (1980): judicial review and balance between Fundamental Rights and DPSPs form the basic structure.

• Special Reference No. 1 of 1964 (Keshav Singh case / U.P. Legislative Assembly case): reconciled legislative privileges and the powers of the High Courts.

• State of Bihar v Bal Mukund Sah (2000): the Court said that the doctrine is a basic feature, and that a judicial function cannot be assigned to non-judicial authorities.

• L. Chandra Kumar v Union of India (1997): tribunals' decisions are subject to High Court scrutiny; judicial review is a basic structure.

• Supreme Court Advocates-on-Record Association v Union of India (2015): struck down the 99th Amendment and the National Judicial Appointments Commission (NJAC) Act as violating judicial independence and the basic structure.

• Raja Ram Pal v Lok Sabha (2007): limited judicial review of the expulsion of members of Parliament in the "cash for query" case.

• Madras Bar Association cases and the Tribunals Reforms Act, 2021: the Court has repeatedly struck down provisions that reduce the independence of tribunals.