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	EritreaIndexed	MexicoReviewed
Legal family	Common law with customary law	Civil law with customary law	Civil law
System of government	Constitutional monarchy	Single-party state	Federal presidential republic
Constitution	Act of Constitution of Tonga	Constitution of Eritrea (ratified 1997, never implemented)	Political Constitution of the United Mexican States
In force since	1875	1997	1917
Capital	Nuku'alofa	Asmara	Mexico City
Official languages	Tongan, English	Tigrinya, Arabic, English	Spanish, Nahuatl, Yucatec Maya
Currency	Tongan paʻanga (TOP)	Eritrean nakfa (ERN)	Mexican peso (MXN)
Population	105,000	3,700,000	130,000,000
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, with six regions and sub-regional administrations whose administrators are centrally appointed. There is no elected regional tier and no legislative devolution.	Federal. Powers not expressly granted to the union are reserved to the 32 states (Article 124). States run their own civil, family and criminal-enforcement codes, but criminal procedure, labour and commercial law were federalised to produce single national codes.
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.	There is no functioning parliamentary process. Law is made by proclamation issued through the executive and published in the Gazette of Eritrean Laws. Because the National Assembly has not sat for more than two decades, the ordinary description of a legislative procedure would be inapplicable.	Bills may be introduced by the President, either chamber, state legislatures or by citizens with 0.13% of the electoral roll. Both chambers must pass an identical text; the President may veto, and Congress overrides with two-thirds of each chamber. Constitutional amendments need two-thirds of Congress plus a majority of state legislatures (Article 135).
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.	The profession is very small. Advocates are licensed by the Ministry of Justice, there is no independent bar association, and legal education runs through a limited number of state institutions following the closure of the University of Asmara as a degree-granting body in 2006. Representation is not permitted before the Special Court. Reliable current figures are not available.	A law degree plus a cédula profesional from the Education Ministry licenses practice; there is no compulsory bar examination or single mandatory bar, which distinguishes Mexico from most of the region. Notaries public are a separate, strictly limited state-appointed profession with exclusive competence over real estate and company deeds.

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.