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	TuvaluReviewed
Legal family	Common law with customary law	Common law	Common law with customary law
System of governmentIdentical	Constitutional monarchy	Constitutional monarchy	Constitutional monarchy
Constitution	Act of Constitution of Tonga	The Grenada Constitution	Constitution of Tuvalu
In force since	1875	1973	1978
Capital	Nuku'alofa	Saint George's	Funafuti
Official languages	Tongan, English	English	Tuvaluan, English
Currency	Tongan paʻanga (TOP)	East Caribbean dollar (XCD)	Australian dollar (AUD)
Population	105,000	126,000	11,000
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 strong island-level authority. Each of the eight inhabited islands has a Falekaupule, the traditional assembly of elders, given statutory power by the Falekaupule Act 1997 to make bylaws and administer island funds. In practice the Falekaupule is the level of government most Tuvaluans deal with.
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.	Bills receive three readings in the single 16-member chamber and are assented to by the Governor-General. With so few members, a government majority is often one or two votes, and motions of no confidence are a routine feature of Tuvaluan politics. Constitutional amendments require a two-thirds majority of all members of Parliament, and certain provisions require a longer notice period before the vote.
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 very small fused profession: practitioners are admitted by the High Court under the Legal Practitioners Act, and many of the lawyers appearing are non-resident or seconded. The People's Lawyer's office is the principal source of representation for individuals, and because the Court of Appeal is non-resident, appellate work is scheduled around visiting judges rather than filed into a standing list.

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.