UCMJ Article 91: Insubordinate Conduct Toward a Warrant, Noncommissioned, or Petty Officer

The day-to-day work of a military unit is often directed not by commissioned officers but by warrant officers, noncommissioned officers (NCOs), and petty officers. These leaders supervise training, enforce standards, and translate a command’s intent into action. Article 91 of the Uniform Code of Military Justice (UCMJ), codified at 10 U.S.C. § 891, protects their authority by making it an offense to strike or assault them, to willfully disobey their lawful orders, or to treat them with contempt or disrespect.

Article 91 is the counterpart to Article 90, which protects commissioned officers. The two articles share a structure, but they protect different categories of leaders, and Article 91 carries a feature that surprises many: a limit on who can commit it.

Who Can Commit the Offense

A defining feature of Article 91 is that only a warrant officer or an enlisted member can be the offender. A commissioned officer cannot commit an Article 91 offense. This restriction follows from the article’s purpose. It exists to protect the authority of warrant, noncommissioned, and petty officers within the structure of obedience that runs through the enlisted and warrant ranks, and a commissioned officer who mistreats such a leader is addressed under other provisions. Descriptions of the offense that say it applies to “officers” in general are inaccurate; the accused must be a warrant officer or an enlisted member.

The Offenses Covered

Article 91 defines three offenses against a warrant officer, NCO, or petty officer who is in the execution of office:

  1. Striking or assaulting, including an attempt to strike, the warrant officer, NCO, or petty officer.
  2. Willfully disobeying the lawful order of the warrant officer, NCO, or petty officer.
  3. Treating with contempt or being disrespectful in language or deportment toward the warrant officer, NCO, or petty officer.

For each, the protected leader must be in the execution of office, and the accused must know the victim’s status as a warrant officer, NCO, or petty officer.

What the Government Must Prove

The required proof varies by offense, but two threads run through all three: the victim’s status and the accused’s knowledge of it.

For striking or assaulting, the government must prove that the accused struck, assaulted, or attempted to strike the victim, that the victim was a warrant officer, NCO, or petty officer in the execution of office, and that the accused knew the victim’s status. For willful disobedience, it must prove that the victim gave a lawful order, that the accused knew the victim’s status, and that the accused willfully disobeyed the order. For contempt or disrespect, it must prove that the accused used contemptuous or disrespectful language or deportment toward the victim, that the victim was in the execution of office, and that the accused knew the victim’s status.

Maximum Punishment

The maximum punishment depends on the offense and on the victim’s status, and the sentencing mechanics depend on the date of the offense, with conduct on or after 27 December 2023 sentenced under the segmented framework of the Military Justice Act of 2016. Under the traditional maxima:

  • Striking or assaulting a warrant officer: dishonorable discharge, forfeiture of all pay and allowances, and confinement for 5 years.
  • Striking or assaulting a superior NCO or petty officer: dishonorable discharge, forfeiture of all pay and allowances, and confinement for 3 years.
  • Willfully disobeying a warrant officer: dishonorable discharge, forfeiture of all pay and allowances, and confinement for 2 years.
  • Willfully disobeying an NCO or petty officer: bad-conduct discharge, forfeiture of all pay and allowances, and confinement for 1 year.
  • Contempt or disrespect toward a warrant officer: bad-conduct discharge, forfeiture of all pay and allowances, and confinement for 9 months.
  • Contempt or disrespect toward a superior NCO or petty officer: bad-conduct discharge, forfeiture of all pay and allowances, and confinement for 6 months.

The structure rewards a clear hierarchy of harm: a physical attack on a warrant officer sits at the top, while verbal disrespect toward an NCO or petty officer sits near the bottom.

Common Defenses

The defenses follow the elements. An unlawful order cannot support a willful-disobedience charge, because the order must be lawful and within the authority of the person who gave it. Lack of knowledge of the victim’s status defeats the charge, since the accused must know the person was a warrant officer, NCO, or petty officer.

For willful disobedience, conduct that was not willful, such as an accidental failure or a genuine misunderstanding, falls short of the offense. For the contempt offense, communication that is critical but respectful and made through proper channels is not disrespect. And for the assault offense, self-defense may apply where the accused reasonably responded to unlawful force.

Distinctions From Neighboring Articles

Article 91 sits between several related provisions. Article 90 protects commissioned officers from willful disobedience, and Article 89 addresses disrespect toward, and assault of, a superior commissioned officer. Article 92 covers the failure to obey orders and regulations generally, including dereliction of duty, without regard to the specific status of the person who issued an order. The clearest line is the one already noted: the conduct here is directed at warrant, noncommissioned, or petty officers, and the accused must be a warrant officer or enlisted member rather than a commissioned officer.

Frequently Asked Questions

Who is protected by Article 91? Warrant officers, noncommissioned officers, and petty officers who are in the execution of their office. Article 90 and Article 89 cover commissioned officers instead.

Who can commit an Article 91 offense? Only a warrant officer or an enlisted member. A commissioned officer cannot be charged under Article 91; misconduct by a commissioned officer toward these leaders is addressed under other provisions.

Can disrespect be nonverbal? Yes. Contempt or disrespect can be shown through gestures, deportment, or behavior, not only spoken words, as long as the conduct is directed at a protected leader in the execution of office.

What is the maximum punishment for assaulting a warrant officer? Up to a dishonorable discharge, forfeiture of all pay and allowances, and confinement for 5 years. Striking a superior NCO or petty officer carries up to 3 years.

Can a service member criticize an NCO without violating Article 91? Yes, when the criticism is respectful and raised through proper channels. The article prohibits contemptuous or disrespectful conduct, not legitimate concerns voiced appropriately.

This article is for general informational purposes only and is not legal advice. It describes military law and procedure of public record, does not address any individual case, and does not create an attorney-client relationship.

Sources

  • 10 U.S.C. § 891, Article 91: https://www.law.cornell.edu/uscode/text/10/891
  • Manual for Courts-Martial, United States (2024 edition), Part IV: https://jsc.defense.gov/Portals/99/2024%20MCM%20files/MCM%20(2024%20ed)%20-%20TOC%20no%20index.pdf
  • Military Attorney Joseph L. Jordan, Articles of the UCMJ

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