Definition
Intra vires (Latin: "within the powers") describes an act performed within the scope of authority lawfully conferred on a person, body, or corporation. An act is intra vires when the actor had legal power to do it — whether that power derives from a corporate charter, a statute, a constitutional grant, a trust instrument, or delegated authority of any kind. The act is valid and enforceable precisely because it falls within authorized limits.
The term operates as a paired concept with its opposite, ultra vires ("beyond the powers"). To call an act intra vires is to affirm its legal competence; to call it ultra vires is to challenge or void it on grounds of excess of authority.
The concept applies across several overlapping legal contexts:
1. Corporate law. A corporation's act is intra vires if it falls within the purposes and powers set out in its charter or articles of incorporation, together with any powers reasonably incidental to those stated purposes.
2. Administrative and public law. A government agency, regulatory body, or statutory tribunal acts intra vires when its actions remain within the jurisdiction and powers granted to it by the enabling legislation.
3. Constitutional law. A legislative or executive act is intra vires a governing constitution when it does not exceed the powers allocated to that branch or level of government.
4. Trust and fiduciary law. A trustee or fiduciary acts intra vires when the act is authorized by the trust instrument or applicable statute.
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Common Confusion
INTRA VIRES vs. ULTRA VIRES. These terms are not merely antonyms — the distinction carries real legal consequences. Ultra vires acts may be void, voidable, or subject to injunction depending on jurisdiction and context; intra vires acts carry no such infirmity. In corporate law research, the question is almost always framed as whether a challenged act is ultra vires, making intra vires the implicit standard against which the act is measured. Researchers should note that the two terms are often discussed together in historical sources: finding one in an index or digest almost always leads to the other.
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Why It Matters in Research
Intra vires rarely appears as a standalone holding. It almost always appears as background framing — the conclusion that an act was within authorized limits, stated in contrast to an ultra vires challenge. Researchers should treat it as a signal term: when a historical case or treatise invokes intra vires, the real analytical substance is usually the boundary being drawn, not the label applied.
In corporate law research, the practical weight of the intra vires/ultra vires distinction shifted substantially across the twentieth century. Early corporate law treated charter purposes as strict limits; acts outside enumerated purposes were void. Modern corporate statutes in most U.S. jurisdictions (following the Model Business Corporation Act) permit corporations to engage in any lawful activity, dramatically narrowing the domain where the ultra vires doctrine can void a transaction. As a result, contemporary sources use intra vires in corporate contexts less than historical sources do — a researcher reading nineteenth- or early twentieth-century case law will encounter it far more frequently as a live legal issue than in modern materials.
In administrative and constitutional law, the intra vires question remains fully vital. Judicial review of agency action is fundamentally a vires inquiry: did Congress authorize this? Did the constitutional allocation of power permit it? Researchers working in administrative law should be alert to the fact that modern American sources often use jurisdictional or statutory authority language rather than the Latin phrase — but the underlying inquiry is identical.
Historical sources may also use intra vires in the context of municipal corporations and public bodies, where the ultra vires doctrine has historically been applied with some strictness: municipal acts exceeding charter authority were void. This line of authority is distinct from private corporate law and should not be conflated with it.
When using Law Mind corpus sources, note that intra vires appears most densely in corporate formation materials, charter interpretation cases, and public authority cases. It clusters with terms like corporate capacity, charter powers, objects clause, and enabling act.
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Historical Dictionary Support
The four historical dictionaries consulted — Black's (1st and 2nd editions), Rapalje & Lawrence, and Bouvier's — are in near-identical agreement. All four define intra vires as describing an act within the scope of a person's or corporation's powers or authority, and all four define it explicitly as the opposite of ultra vires. This uniformity is itself informative: the term had a settled, uncontested meaning in legal usage by the late nineteenth century. None of the historical sources elaborate on the consequences of an act being intra vires (as opposed to the consequences of ultra vires acts, which received extensive treatment in case law and commentary). The historical dictionaries treat intra vires as definitionally complete once the contrast with ultra vires is established.
Black's 2nd edition cites Pittsburgh, C. & St. L. R. Co. v. Dodd, 115 Ky. 176, 72 S.W. 827 — one of the few case references in these entries — as an illustration of the principle in a corporate context, consistent with the era's focus on railroad and corporate charter disputes as the primary arena for vires analysis.
What the historical sources do not address is the application of intra vires reasoning in administrative and constitutional contexts, which expanded significantly in the twentieth century. Researchers should not rely on historical dictionary entries to understand the modern administrative law usage of the concept.
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Jurisdictional Note
In the United States, statutory reforms to corporate law have largely displaced the ultra vires doctrine in private corporate transactions, making intra vires determinations less consequential there. In the United Kingdom, Canada, and other common law jurisdictions, the concept retains greater practical significance in corporate law, particularly for public companies and statutory corporations. In U.S. administrative law and constitutional law, vires analysis is central regardless of whether the Latin phrase is used.
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Encyclopedia Cross-Reference
Corporate Formation — Corporate Purpose, Powers, and Ultra Vires Doctrine (Law Mind Business Organizations & Corporate Law Encyclopedia)
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