Comparison

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Because every portal follows the same fifteen-section outline, the comparison is genuinely like-for-like rather than a collage of whatever each government happens to publish.

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Comparison of selected legal systems
Attribute	TongaReviewed	GrenadaReviewed	BelizeReviewed	ArgentinaReviewed
Legal family	Common law with customary law	Common law	Common law	Civil law
System of government	Constitutional monarchy	Constitutional monarchy	Parliamentary constitutional monarchy	Federal presidential republic
Constitution	Act of Constitution of Tonga	The Grenada Constitution	Belize Constitution	Constitution of the Argentine Nation
In force since	1875	1973	1981	1853
Capital	Nuku'alofa	Saint George's	Belmopan	Buenos Aires
Official languages	Tongan, English	English	English, Spanish, Belize Kriol, Q'eqchi', Mopan	Spanish
Currency	Tongan paʻanga (TOP)	East Caribbean dollar (XCD)	Belize dollar (BZD)	Argentine peso (ARS)
Population	105,000	126,000	410,000	46,000,000
Division of powers	Unitary. The Legislative Assembly legislates for the whole kingdom, and the island divisions of Tongatapu, Vava'u, Ha'apai, 'Eua and the Niuas are administrative districts headed by governors. Below that, town and district officers are elected under the Fakafekau'aki and District and Town Officers Act.	Unitary. The state comprises Grenada, Carriacou and Petite Martinique; Carriacou and Petite Martinique have a Ministry and local administration but no separate legislature.	Unitary, with six districts and elected town and village councils. Maya communal land rights in Toledo are recognised through the courts rather than by statute, and implementation is supervised by the CCJ.	Federal. Twenty-three provinces plus the autonomous City of Buenos Aires retain all powers not delegated to the nation (Article 121). Substantive civil, commercial, criminal and labour law is federal and uniform, but each province legislates its own procedure and runs its own judiciary — an inversion of the United States allocation.
How law is made	Bills pass three readings in the Legislative Assembly and require the King's assent, which is a real rather than purely formal step. Ordinary bills need a simple majority. Amendments to the Constitution require a majority in the Assembly at three separate readings and the consent of the King and Privy Council, and clause 79 forbids any amendment affecting the law of liberty, the succession to the throne or the titles and hereditary estates of the nobles.	Bills pass three readings in both Houses and receive the Governor-General's assent. Constitutional amendments to entrenched provisions need a two-thirds majority in the House of Representatives and then approval by a referendum, a double lock that has defeated every reform package put to voters.	A bill passes three readings in the House of Representatives, then the Senate, and receives the Governor-General's assent. Money bills originate in the House. Constitutional amendments need a two-thirds majority of all House members, and certain entrenched provisions require three-quarters.	Bills may be introduced in either chamber, by the executive, or by citizen initiative. One chamber acts as chamber of origin and the other as revising chamber; insistence rules resolve disagreement. The President may veto in whole or in part, and Congress overrides with two-thirds of both chambers. Necessity-and-urgency decrees are permitted but excluded from criminal, tax, electoral and party matters, and must pass a bicameral committee.
Legal profession	Law practitioners are admitted by the Chief Justice and licensed under the Law Practitioners Act, with the Tonga Law Society as the professional body. Most qualify overseas or at the University of the South Pacific. A practitioner working on land must know the Land Act's allotment system rather than general property law, because the constitutional bar on selling land means conveyancing in the ordinary sense does not exist.	A fused profession of legal practitioners admitted by the High Court under the Legal Profession Act, after a law degree and the Legal Education Certificate. The Grenada Bar Association represents practitioners.	A fused profession of attorneys-at-law admitted by the High Court under the Legal Profession Act, with the Bar Association of Belize exercising disciplinary functions. Commonwealth qualifications are recognised on application, which keeps a small bar workable.	A five-to-six-year law degree followed by mandatory registration with a provincial or city bar association, which holds disciplinary power. The Colegio Público de Abogados de la Capital Federal governs practice in Buenos Aires. There is no separate bar examination; enrolment follows the degree. Notaries (escribanos) are a distinct numerus clausus profession with exclusive competence over real estate transfers.

A comparison table flattens nuance by design. Where a difference matters to a decision you are making, open both portals and read the section in full — the constitutional detail behind a one-line summary is often the part that governs the outcome.