Constituent power supplies no lawful procedure within Ukraine's order, and international law would not supply the missing authority for an extra-constitutional cession

The Gist

A people can, in theory, tear up its constitution and start over, but that is a break from the legal order, not a legal procedure within it, and Ukraine's Constitutional Court has said the Constitution can only be changed through its own amendment chapter. International law would not fix that problem: it lets Ukraine challenge a treaty made in obvious breach of its basic rules, and it voids treaties forced at gunpoint. But international law does not automatically void every deal that breaks domestic rules.

Conclusion

A theory of constituent power may explain how a people could remake its constitutional order, but it supplies no lawful procedure within the existing one: the Constitution provides no replacement procedure, and the Constitutional Court has held that it may be changed only through Chapter XIII. An extra-constitutional cession would therefore lack domestic legality. International law would not supply the missing authority, since it gives Ukraine grounds to contest a treaty concluded in manifest breach of a fundamental rule on competence and voids a treaty procured by unlawful force. It does not, however, treat every domestic defect as voiding a cession, and other states' freedom not to recognize a change is distinct from that change's illegality.

Premises

1. Article 5 vests the right to determine and change the constitutional order exclusively in the people, but the Constitution provides no constituent assembly or procedure for wholesale replacement [1]. In 2018 the Constitutional Court held that the Constitution may be changed only through Chapter XIII and struck down a referendum law that would have allowed a constitution to be adopted or changed by referendum outside that procedure [9].
2. In 2000 the Court struck from a popular-initiative ballot the question whether the Constitution should be adopted by all-Ukrainian referendum, because it would cast doubt on the force of the existing Constitution, and held that the other approved questions bind the state only through the Chapter XIII procedure [8].
3. An act toward cession outside the constitutional procedure would lack domestic legality, and no official is authorized to relinquish territory; commentators note exposure to prosecution under Article 110 of the Criminal Code for encroachment on territorial integrity [15].
4. On the international plane, Article 46 of the Vienna Convention lets a state invoke a manifest violation of an internal rule of fundamental importance on competence to conclude treaties, and Article 52 voids a treaty procured by the threat or use of force in violation of the Charter [17,14]. The General Assembly has called on states not to recognize the purported annexations of 2014 and 2022 [18].

Assumptions

• The Vienna Convention's grounds are narrow: Article 46 requires a violation that is manifest and concerns a rule of fundamental importance, a state can lose the ground by acquiescence under Article 45, and whether a treaty is procured by force under Article 52 is contested; recognition of territorial change is governed by customary law and the duty not to recognize acquisitions by force rather than by the Convention.
• Uti possidetis juris fixes boundaries at the moment of independence; it does not by itself forbid a later boundary change agreed between states, and the Helsinki Final Act expressly allows frontiers to change by peaceful means and by agreement.
• Some commentators argue that constitutions yield to state survival in extremis; Ukraine's Constitution contains no necessity clause that authorizes territorial cession, so such a claim would be political, not a lawful procedure.
• Being outside the legal order is not the same as lacking every kind of legitimacy; the claim here is about legality and the international consequences of illegality, not about political or moral legitimacy.

Analysis

Argument type: Deductive.

Potential Fallacies

• Circular reasoning (Premise 1 and Premise 6) — The argument assumes that constitutional procedures are the sole source of legitimacy, then uses this assumption to prove that extra-constitutional processes lack legitimacy. This creates a logical circle where the conclusion is embedded in the premises.
• False dichotomy (Throughout the argument structure) — The argument presents only two options: constitutional procedures or illegitimate extra-legal action. This ignores the possibility of legitimate constitutional revolution or the doctrine that popular sovereignty can override existing procedures in extraordinary circumstances.
• Question begging (Assumption 1) — The argument assumes the legitimacy of existing constitutional procedures without addressing whether those procedures themselves might lack legitimacy or democratic foundation.

Counterarguments

These challenges are not ranked.

• Premise 1 (High impact) — Popular sovereignty theory holds that the people retain ultimate constituent power to reconstitute their government when existing procedures are inadequate or captured. Constitutional legitimacy derives from popular consent, not procedural compliance.
• Conclusion (High impact) — Historical precedent demonstrates that many legitimate constitutional orders originated through extra-constitutional means (American Revolution, post-WWII constitutions, 1989 Eastern European transitions) and later gained both domestic and international recognition.
• Assumption 1 (High impact) — When constitutional procedures become impossible due to authoritarian capture or deliberate obstruction, extra-constitutional action becomes necessary for democratic legitimacy. Formalistic adherence to procedures can entrench illegitimate regimes.

Suggested Improvements

• Theoretical foundation — Acknowledge and engage with competing theories of constitutional legitimacy, particularly popular sovereignty and revolutionary constitutionalism The argument's credibility suffers from treating contested theoretical premises as settled facts
• Historical context — Address historical examples of successful extra-constitutional transitions that gained legitimacy and explain how they differ from the current framework Ignoring contrary historical evidence makes the argument appear selective and incomplete
• Scope limitations — Specify the conditions under which the argument applies and acknowledge circumstances where it might not hold Absolute claims are more vulnerable than qualified ones that recognize contextual factors

Scenario Tests

• A constitutional dictatorship that maintains procedural compliance while violating human rights (Challenges) — The argument's logic would require recognizing such a regime as legitimate, which conflicts with moral intuitions about substantive justice
• The American Revolution and founding of the US Constitution (Challenges) — The argument would classify the American Revolution as illegitimate since it violated British constitutional procedures, making the US Constitution itself illegitimate
• Post-Soviet constitutional transitions in Eastern Europe (Challenges) — These widely-recognized legitimate transitions occurred through extra-constitutional means, contradicting the argument's framework

Coherence & Relevance

The argument maintains internal logical consistency but suffers from weak foundational premises and failure to address competing theoretical frameworks. The deductive structure is valid, but the premises are insufficiently supported, particularly the contested claim that procedural compliance is necessary for legitimacy.

• Legal systems derive their authority and legitimacy from established procedural frameworks (Strong) — Fails to address how legal systems initially gain legitimacy or what happens when procedures themselves lack democratic foundation
• Ukrainian Constitution explicitly defines amendment procedures with no provision for constituent assembly (Strong) — Constitutional silence could be interpreted as implicit permission rather than prohibition
• International law establishes state discretion in recognition (Moderate) — Discretion means recognition is possible, which undermines rather than supports the argument's conclusion

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