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📌 Constitutional law mainly concerns political organization, sovereignty, the Constitution, and relations between powers, whereas administrative law mainly concerns the administration and public services.
📌 In the organic sense, power refers to the institution or authority holding a competence, whereas in the functional sense, power refers to the activity or legal competence exercised by that organ.
Further detail
📌 Public law concerns the organization and operation of the state and relations between public persons and private individuals, whereas private law mainly governs relations between private persons.
Institutionalizing power detaches authority from individuals and stabilizes the state.
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Article 24 of the 1958 Constitution provides that Parliament votes on legislation, assigning the legislative function to Parliament under constitutional conditions.
The constitutional block includes: the 1958 Constitution, the Declaration of the Rights of Man and of the Citizen of 1789, the Preamble of the 1946 Constitution, the Environmental Charter of 2004
📌 Constitutionality asks whether an action complies with constitutional rules, whereas legitimacy asks whether it is considered acceptable, justified, or consistent with political and social will.
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Constitutional law both empowers institutions and limits their action.
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From the 1950s, constitutional scholars increasingly studied political practices, electoral behavior, political parties, and the concrete functioning of regimes because constitutional texts did not always match political reality.
The Constitutional Council’s expanded role was reinforced by the constitutional revision creating the Question prioritaire de constitutionnalité in 2008, whose mechanism entered into force in 2010.
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Texts, practices, judges, and society progressively reshape the discipline.
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📌 Ancient natural law concerns human nature and the natural organization of the city, whereas modern natural law emphasizes individual liberty, equality, and consent.
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Roman law distinguished public law from private law and developed the notion of public power, contributing to the modern distinction between an institution and the person exercising authority.
Cicero’s De Republica, written from 54 BC, reflects on the existence of a mixed regime.
Ancient polity describes power, whereas the modern Constitution prescribes and limits it.
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📌 Political liberty can be understood as security ensured by sovereign power, participation in forming the general will, or protection against abuses of power.
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England 1688–1689, America 1776–1787, France 1789.
In De l’esprit des lois, Montesquieu links political liberty to a moderate government and to the separation of powers.
Montesquieu identifies the English balance of powers through the monarchy, the House of Lords, and the House of Commons. — De l’esprit des lois
Three English institutions—monarch, Lords, and Commons—hold power in balance.
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📌 For the Ancients, liberty primarily consisted in direct participation in the political life of the city, whereas for the Moderns it primarily consisted in security in private enjoyment. — Benjamin Constant, De la liberté des Anciens comparée à celle des Modernes, 1819
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Ancient liberty is collective political participation; modern liberty protects private independence.
Montesquieu identifies the English political system as balancing the monarchy, the House of Lords, and the House of Commons in order to limit the concentration of power.
Benjamin Constant distinguishes the liberty of the Ancients, based mainly on direct participation in civic political life, from the liberty of the Moderns, based mainly on security in private enjoyments and protection of the private sphere. — De la liberté des Anciens comparée à celle des Modernes, 1819
Horizontal limitation separates and balances state powers, whereas vertical limitation restricts the state through rights and freedoms guaranteed to individuals.
Article 16 of the Declaration of the Rights of Man and of the Citizen of 1789 states that a society without guaranteed rights or determined separation of powers has no Constitution.
Horizontal limits restrain institutions from each other; vertical limits protect individuals from the state.
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📌 Thomas Paine and Sieyès present the Constitution as preceding constituted government and organizing the powers of the nation.
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The Latin term constitutio derives from constituo, meaning notably to establish, arrange, organize, or institute.
In religious contexts, pontifical constitutions designated normative acts or decisions of the pope and helped give the term a broader legal meaning.
Under the French Ancien Régime, the fundamental laws of the kingdom included rules on succession to the throne, notably traditions associated with Salic law.
Constituo → religious rules → fundamental laws → citizen-made Constitution.
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📌 The institutionalist approach studies institutions and the political balances between them, whereas the normativist approach studies the Constitution as a superior set of legal norms. — Hans Kelsen
📌 Michel Troper distinguishes an idealist legal conception of the Constitution as a solemn binding text from a realist conception of the Constitution as the actual organization of political power and its power relations.
Further detail
Institutionalism observes power in institutions, whereas normativism studies binding legal norms.
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A written Constitution groups constitutional rules in one or more written texts, whereas an unwritten Constitution also relies on conventions, jurisprudence, historical principles, and other unwritten rules.
A flexible Constitution can be amended through a procedure similar or identical to ordinary legislation, whereas a rigid Constitution requires a special and more demanding amendment procedure.
The formal approach defines constitutional rules by their adoption, amendment, or repeal procedure, whereas the material approach defines them by their content concerning public powers and institutional competences.
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France's Constitution of 4 October 1958 is supplemented by other constitutional texts and principles grouped under the bloc de constitutionnalité.
Carl Schmitt distinguishes constitutional laws adopted through the constitutional procedure from the Constitution in the true sense, which concerns the fundamental political existence of the state, including sovereignty and its political form. — Théorie de la Constitution
Written/unwritten concerns form; flexible/rigid concerns amendment; formal/material concerns procedure versus content.
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📌 A total revision modifies the entire existing Constitution while maintaining continuity, whereas constituent power creates a new Constitution after a fundamental rupture.
📌 Under Article 89 of the French Constitution, revision initiative is shared between the President of the Republic on the Prime Minister's proposal and members of Parliament.
📌 A French constitutional revision is normally ratified by referendum, but an executive-initiated project may be submitted to Parliament sitting in Congress and requires three-fifths of votes cast.
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📌 In France, the National Assembly and the Senate must adopt an identical revision text before ratification can occur.
Initiative → elaboration and adoption → ratification.
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📌 Temporal limits determine when constitutional revision may occur, whereas material limits determine which constitutional principles may be revised.
📌 Under Article 89 of the French Constitution, revision cannot be initiated or continued when the integrity of the territory is threatened, during a vacancy or definitive incapacity of the presidency, or during the exercise of Article 16 exceptional powers.
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Under Article 284 of the Portuguese Constitution, an ordinary revision may in principle occur only five years after the previous ordinary revision, while an extraordinary revision may be decided by a four-fifths majority of the Assembly of the Republic.
In Switzerland, constitutional revision requires approval by the people nationally and by the cantons, while in the United States Article V requires a two-thirds majority in each congressional chamber and ratification by three-quarters of the states.
Temporal limits determine when revision is possible; material limits determine what may be revised.
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📌 The European or Kelsenian model is concentrated in a specialized constitutional court, abstract and objective, and may operate a priori before a law enters into force. — Hans Kelsen
Further detail
In Marbury v. Madison, the Supreme Court compared a federal statute with the Constitution, found that the statute granted a power not provided by the Constitution, and set the conflicting provision aside. — John Marshall, 1803
Hans Kelsen's theory of a hierarchy of legal norms was institutionalized after the First World War through the creation of a specialized Austrian Constitutional Court.
American review is diffuse and concrete; European review is concentrated and abstract.
★ Must-know
📌 Under Article VI of the United States Constitution, the Constitution and laws of the United States that conform to it constitute the supreme law of the land, so the Constitution prevails over any ordinary law that conflicts with it.
📌 The American model of constitutional justice is diffuse, concrete, subjective, and a posteriori: any court may review constitutionality in a real dispute, from the situation and rights of the parties, after the law has been adopted and when it must be applied.
Further detail
D-C-S-A: diffuse, concrete, subjective, a posteriori
★ Must-know
📌 The European or Kelsenian model is concentrated, abstract, and objective: constitutional review is entrusted to a specialized constitutional court and may occur before a law enters into force as well as after its adoption.
📌 For Hans Kelsen, the Constitution is a genuine legal norm, and guaranteeing it requires a judge capable of reviewing and sanctioning norms that violate it.
Further detail
American control is diffuse and pragmatic; Kelsenian control is concentrated and doctrinal
| Dimension | Ancient liberty | Modern liberty |
|---|---|---|
| Main focus | Direct participation in political life | Security in private enjoyment |
| Relation to public and private spheres | Weak separation | Protected private sphere |
| Role of the state | Collective political participation | Limited intervention in personal freedoms |
| Dimension | American model | European or Kelsenian model |
|---|---|---|
| Institution | Ordinary courts, including federal judges | Specialized constitutional court |
| Timing | A posteriori | A priori or a posteriori |
| Nature | Diffuse, concrete, subjective | Concentrated, abstract, objective |
Test your knowledge on Foundations of Constitutional Law with 45 multiple-choice questions with detailed corrections.
1. Regarding the purpose and scope of constitutional law, which statements are correct?
2. Concerning the principal field of constitutional law, tick the correct statements:
Memorize the key concepts of Foundations of Constitutional Law with 86 interactive flashcards.
What does constitutional law institutionalize?
Political power by organizing, framing, and stabilizing its exercise.
Which bodies does constitutional law primarily address?
The President, Government, Parliament, and Constitutional Council.
What does public law mainly govern?
Relations between public persons and private individuals and state organization.
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