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	Marshall IslandsReviewed	ArgentinaReviewed
Legal family	Mixed common law with customary law	Civil law
System of government	Parliamentary republic in free association with the United States	Federal presidential republic
Constitution	Constitution of the Marshall Islands	Constitution of the Argentine Nation
In force since	1979	1853
Capital	Majuro	Buenos Aires
Official languages	Marshallese, English	Spanish
Currency	United States dollar (USD)	Argentine peso (ARS)
Population	42,000	46,000,000
Division of powers	Unitary with strong local government. Each inhabited atoll has an elected local council with substantial authority over land use and local services, and the Council of Iroij, a body of twelve traditional leaders, reviews legislation affecting custom and land and may express its opinion to the Nitijela.	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 the Nitijela and are signed by the President. Legislation affecting customary law, land tenure or traditional practice must be referred to the Council of Iroij, which may return its opinion to the chamber; the Nitijela may proceed regardless, but the referral is a required step. Constitutional amendments require either a two-thirds vote of the Nitijela followed by a referendum, or a constitutional convention.	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	Practitioners are admitted by the Supreme Court, and admission rules recognise United States legal qualifications, so much of the bar trained in the US. The Traditional Rights Court works differently: its judges are selected for knowledge of custom and traditional title rather than legal qualification, and proceedings there are conducted in Marshallese.	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.