A codified constitution consolidates a state's core constitutional rules—the structure of government, separation of powers, fundamental rights, and amendment procedures—into one master document that sits above ordinary statute law. Because the text is entrenched, it usually can only be changed through a special procedure (supermajority vote, referendum, ratification by sub-national units), rather than by a simple parliamentary majority.
Most modern states have codified constitutions. Familiar examples include the United States Constitution (1787), the Basic Law of the Federal Republic of Germany (1949), the Constitution of India (1950), the Constitution of the Fifth French Republic (1958), and the Constitution of South Africa (1996). Each of these documents is judicially enforceable: courts can strike down legislation or executive acts that conflict with it, a power often called constitutional or judicial review.
By contrast, an uncodified constitution—as in the United Kingdom, New Zealand, and Israel—draws its rules from a mix of statutes, conventions, case law, and authoritative texts, with no single document holding superior legal status. In those systems, parliamentary sovereignty typically prevails over judicial review of primary legislation.
Key features political researchers tend to flag:
- Entrenchment: amendment requires more than an ordinary legislative majority.
- Hierarchy of norms: constitutional provisions trump statutes and regulations.
- Justiciability: a constitutional or supreme court can interpret and enforce the text.
- Symbolic function: codified texts often open with a preamble articulating founding values (e.g., "We the People").
Codification does not guarantee constitutionalism in practice. Many authoritarian states have detailed written constitutions that are routinely ignored or suspended. Conversely, uncodified systems can sustain robust rights protection through convention and ordinary statute. For MUN and IR analysis, the relevant questions are usually whether the text is entrenched, whether it is justiciable, and whether political actors actually treat it as binding.
Example
When South Africa adopted its codified constitution in 1996, the Constitutional Court gained authority to strike down apartheid-era statutes inconsistent with the new Bill of Rights.
Frequently asked questions
No. The UK has an uncodified constitution drawn from statutes (such as the Magna Carta and the Human Rights Act 1998), common law, and constitutional conventions, with no single overriding document.
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