Article 92 of the Uniform Code of Military Justice (UCMJ) makes it an offense to fail to obey a lawful general order or regulation, to fail to obey other lawful orders, or to be derelict in the performance of duties. Because the article rests on the existence of a clear and lawful directive, problems arise when the regulation a member is accused of violating is ambiguous, or when the same regulation has been enforced inconsistently across a command. The UCMJ and the case law that interprets it address these situations through requirements that the order be lawful and clear, that the accused have the necessary knowledge or duty, and through due process limits on punishing conduct under hopelessly vague rules.
The elements that ambiguity can undermine
For the most serious form of Article 92, violation of a lawful general order or regulation, the government must prove that a certain lawful general order or regulation was in effect, that the accused had a duty to obey it, and that the accused violated or failed to obey it. For other lawful orders, the government must additionally prove that the accused had knowledge of the order. Ambiguity in the regulation strikes at the heart of these elements. If a regulation is so unclear that it does not actually prohibit the conduct charged, then there was no applicable directive to violate. And for orders requiring proof of knowledge, a member cannot meaningfully know and be bound by a rule whose meaning cannot be discerned.
Lawfulness and the requirement of clarity
A foundational principle of Article 92 is that the order or regulation must be lawful. Lawfulness includes more than proper authority to issue the directive. An order that is vague, overbroad, or arbitrary is not enforceable as a basis for criminal liability. The directive must be sufficiently definite that a person subject to it can understand what is required or prohibited. When a regulation is genuinely ambiguous, the defense can argue that it fails this clarity requirement and therefore cannot support a conviction, because the member was not given fair notice of the prohibited conduct.
The void-for-vagueness doctrine
The constitutional backstop for ambiguous regulations is the void-for-vagueness doctrine, grounded in the Due Process Clause of the Fifth Amendment. The doctrine holds that criminal responsibility should not attach where a person could not reasonably understand that the contemplated conduct was proscribed. Applied in the military context, the inquiry focuses on whether the accused had actual knowledge of the order’s nature and terms and whether the accused was on fair notice of the particular conduct that was forbidden. A regulation so unclear that a reasonable person could not understand what it required can be challenged on vagueness grounds. The practical effect is that a defense to an Article 92 charge can attack the regulation itself, arguing that it is too indefinite to give the fair notice that due process demands.
How inconsistent enforcement fits in
Inconsistent enforcement raises related but distinct concerns. Standing alone, the fact that others violated the same regulation without punishment does not automatically make a charge unlawful, because commanders retain discretion over how to dispose of misconduct. However, inconsistent enforcement can support several arguments. First, it can reinforce a vagueness claim: if even the command cannot consistently identify what the regulation prohibits, that inconsistency is evidence the rule does not provide fair notice. Second, widely tolerated noncompliance can support an argument that the regulation was not truly in effect as a binding directive, or that the member reasonably understood it to be unenforced. Third, in extreme cases, selective and purposeful targeting of one member while ignoring similarly situated violators can raise a separate selective-prosecution concern, though that claim carries a heavy burden and requires showing intentional, arbitrary selection rather than mere unevenness.
The interaction with mistake and good faith
When a regulation is ambiguous, a member who reasonably interpreted it one way and acted accordingly may have a mistake-based defense. If the member honestly and reasonably read an unclear regulation to permit the conduct, the member can argue the absence of the required culpable state, particularly for dereliction, which depends on a willful or negligent failure to perform a known duty. A duty that is unclear because the governing regulation is ambiguous is harder for the government to establish as a known duty that the member willfully or negligently failed to perform.
Practical defense approach
A member charged under Article 92 with violating an ambiguous or unevenly enforced regulation should obtain the exact text of the regulation and any implementing guidance, because the precise wording determines whether the conduct was actually covered. The member should document how the regulation was understood and applied in the unit, including instances where others engaged in the same conduct without consequence, and any guidance or training that shaped the member’s interpretation. These materials support both a vagueness challenge and a fair-notice argument. Counsel can then assess whether to move to dismiss on the ground that the regulation cannot lawfully support the charge or to contest the knowledge and duty elements at trial.
Conclusion
Article 92 addresses ambiguous and inconsistently enforced regulations through its insistence that the underlying order or regulation be lawful and clear, reinforced by the constitutional void-for-vagueness doctrine that forbids punishing conduct a person could not reasonably know was prohibited. Ambiguity can defeat the existence of an enforceable directive or negate the knowledge and duty elements, while inconsistent enforcement can bolster a vagueness claim and, in narrow circumstances, raise selective-prosecution concerns. Because these defenses turn on the exact regulatory text and the command’s enforcement history, a member facing such a charge should preserve those materials and consult experienced military defense counsel.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how the Uniform Code of Military Justice (UCMJ), the Rules for Courts-Martial, the Military Rules of Evidence, and related military administrative processes work as a matter of public legal education. It does not constitute legal advice, a legal opinion, or a recommendation about any particular case, and it is not a substitute for advice from a qualified military defense attorney who can evaluate the specific facts and command, service, and jurisdictional circumstances involved.
Reading this article, or contacting any website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author. Every court-martial, nonjudicial punishment action, administrative separation, and security-clearance matter turns on its own facts, the charged articles, the convening authority, the service branch, and the evidence, and outcomes vary widely from one case to another.
Military law also changes over time. The Military Justice Act of 2016 (effective January 1, 2019) and subsequent National Defense Authorization Acts renumbered and rewrote many punitive articles, revised the Article 32 preliminary hearing, and altered sentencing, clemency, and appellate procedures. Statutes, regulations, executive orders, the Manual for Courts-Martial, and decisions of the service Courts of Criminal Appeals and the Court of Appeals for the Armed Forces may have been amended, superseded, or reinterpreted after this article was written, and article numbers or procedures cited here may have changed.
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