Personal Jurisdiction: Who Is Subject to the UCMJ

Personal jurisdiction in military justice starts with a list rather than a doctrine. Article 2 of the Uniform Code of Military Justice names fourteen categories of person, and being in one of them is what it means to be presently subject to the Code. One article further on, Article 3 then provides that certain jurisdiction is not lost when a status ends, which is why the list answers the first question and not every question.

This page quotes that list, separates the categories that turn on status from the ones that turn on time or place, sets out the provisions that decide when jurisdiction begins and when it ends, and then takes Article 3 on its own. It also names the categories that surprise people, because several of them cover individuals who would not describe themselves as serving.

It does not decide whether jurisdiction attaches to any particular person. Several categories carry conditions, conditions can be contested, and that contest is litigated rather than looked up.

The list, and what it answers

Article 2(a) opens without a general principle. It goes straight to enumeration, and the first entry covers the case everyone expects:

“(1) Members of a regular component of the armed forces, and members of the Space Force on active duty under section 20105 of this title, including those awaiting discharge after expiration of their terms of enlistment; volunteers from the time of their muster or acceptance into the armed forces; inductees from the time of their actual induction into the armed forces; and other persons lawfully called or ordered into, or to duty in or for training in, the armed forces, from the dates when they are required by the terms of the call or order to obey it.”

Source: 10 U.S.C. 802 (Article 2), subsection (a)(1).

Three timing rules are already inside that one paragraph. Members awaiting discharge after their enlistment has expired are still covered. Volunteers are covered from muster or acceptance, and inductees from actual induction. People ordered to duty are covered from the date the order requires them to obey it, not from the date they arrive.

Entry (2) adds “Cadets, aviation cadets, and midshipmen.”

Status categories that do not require being on duty

Four entries cover people who are not serving in the ordinary sense, and they are the reason this article is quoted rather than summarised.

“(4) Retired members of a regular component of the armed forces who are entitled to pay.”

“(5) Retired members of a reserve component, or retired members of the Space Force who qualified for a non-regular retirement and are receiving retired pay, who are receiving hospitalization from an armed force.”

“(6) Members of the Fleet Reserve and Fleet Marine Corps Reserve.”

“(7) Persons in custody of the armed forces serving a sentence imposed by a court-martial.”

Source: 10 U.S.C. 802 (Article 2), subsections (a)(4) through (a)(7).

Read the conditions rather than the headings. Entry (4) covers retired members of a regular component who are entitled to pay; entitlement to pay is the operative condition. Entry (5) is a different rule for retired reserve members, and it requires that the person be receiving hospitalization from an armed force. Two retirees can therefore stand in different positions under the same article.

Entry (14), added later, extends similar treatment to “Retired members of the Space Force who qualified for a regular retirement under section 20601 or 20603 of this title and are receiving retired pay.” The words “20601 or” were inserted by Pub. L. 118–159 on 23 December 2024, so any version of this entry citing only section 20603 is describing the pre-2024 text.

Categories that depend on time or place

Three entries attach only in defined circumstances, and the circumstance is written into the text.

“(10) In time of declared war or a contingency operation, persons serving with or accompanying an armed force in the field.”

Source: 10 U.S.C. 802 (Article 2), subsection (a)(10).

The condition is a declared war or a contingency operation, and the person must be serving with or accompanying a force in the field. Outside those conditions the entry does not reach.

Entries (11) and (12) both open with the same qualifier, “Subject to any treaty or agreement to which the United States is or may be a party or to any accepted rule of international law”, and both are limited to persons or areas outside the United States and outside Puerto Rico, Guam and the Virgin Islands. Where a treaty allocates authority differently, the treaty is written into the statute as a condition on the entry, which is the hinge NATO SOFA jurisdiction turns on.

Entry (9) covers “Prisoners of war in custody of the armed forces”, and entry (13) reaches persons in the eight categories listed in Article 4 of the treaty the statute names as the Convention Relative to the Treatment of Prisoners of War, done at Geneva August 12, 1949 “who violate the law of war.”

Reserve members: coverage that switches on and off

Reserve component members are not continuously subject to the Code. Article 2(a)(3) attaches them while on inactive-duty training and during periods the statute then lists, including:

“(i) Travel to and from the inactive-duty training site of the member, pursuant to orders or regulations.”

Source: 10 U.S.C. 802 (Article 2), subsection (a)(3)(B)(i).

The remaining listed periods are the intervals between consecutive training periods on the same day and between training on consecutive days, in each case pursuant to orders or regulations. National Guard members of the Army and Air Force are reached “but only when in Federal service.”

Article 2(d) then supplies the mechanism that makes this workable. A reserve member not on active duty who is made the subject of Article 15 or Article 30 proceedings may be ordered to active duty involuntarily for a preliminary hearing, trial, or non-judicial punishment, only for an offense committed while on active duty or inactive-duty training, and “only by a person empowered to convene general courts-martial in a regular component.” Unless the Secretary concerned approved the order, such a member may not be sentenced to confinement.

When jurisdiction begins, and what does not end it

Two subsections answer the questions that the list alone leaves open.

Article 2(b) fixes the starting point for an enlistment: a voluntary enlistment by a person with capacity to understand its significance is valid for jurisdictional purposes, and “a change of status from civilian to member of the armed forces shall be effective upon the taking of the oath of enlistment.”

Article 2(c) addresses the case where the enlistment itself is defective. Where a person voluntarily submitted to military authority, met the age and mental competency qualifications, received military pay or allowances, and performed military duties, that person is subject to the Code “until such person’s active service has been terminated in accordance with law or regulations prescribed by the Secretary concerned.”

Two consequences follow. Jurisdiction can rest on conduct and acceptance rather than on a flawless enlistment document. And it ends by termination in accordance with law or regulation, which is an act with a date, not a drift out of the service.

Article 3: the jurisdiction that a change of status does not take away

Article 2 says who is presently subject to the Code. Article 3 is a separate article, and it answers a different question: what happens to an offense committed under an earlier status when that status ends.

“(a) Subject to section 843 of this title (article 43), a person who is in a status in which the person is subject to this chapter and who committed an offense against this chapter while formerly in a status in which the person was subject to this chapter is not relieved from amenability to the jurisdiction of this chapter for that offense by reason of a termination of that person’s former status.”

Source: 10 U.S.C. 803 (Article 3), subsection (a).

Read the two statuses in that sentence. The person must be in a covered status now, and must have committed the offense while formerly in a covered status. Where both hold, ending the former status does not end amenability for that offense, and the whole provision is “[s]ubject to” the statute of limitations in Article 43.

Three further subsections close specific routes out.

Fraudulent discharge. A person discharged and later charged with having fraudulently obtained that discharge is subject to trial by court-martial on that charge, and on conviction becomes subject to trial “for all offenses under this chapter committed before the fraudulent discharge.”

Desertion. A person who has deserted may not be relieved from jurisdiction “by virtue of a separation from any later period of service.”

Reserve and Space Force periods. A member of a reserve component or the Space Force is not, “by virtue of the termination of a period of active duty or inactive-duty training”, relieved of jurisdiction for an offense committed during that period.

So the Article 2 list and the Article 3 rule do different work, and a description of personal jurisdiction that uses only the list will get the status-transition cases wrong. What Article 3 does not do is create jurisdiction over someone outside Article 2 today: subsection (a) requires a present covered status as its first condition.

What personal jurisdiction does not settle

It is one of three jurisdictional questions and it answers only its own. Whether the conduct is an offense the Code reaches is subject-matter jurisdiction. Whether the place matters is territorial jurisdiction. A person can be squarely inside Article 2 and the case still fail on one of the other two.

It also does not decide whether a court-martial will be convened. Being subject to the Code makes a court-martial possible; whether a case is referred is a separate decision made by someone else, and who sends a case to court-martial sets out who now holds it.

And it does not resolve a contested status. Entries (4), (5), (10) and (12) all contain conditions, and a dispute about whether a condition is met is argued in the case.

What this page does not decide

Whether any particular person is subject to the Code. The conditions in Article 2 are facts, and facts are proved rather than looked up.

What courts have held these entries to mean. The reach of the retiree provisions in particular has been litigated, and no decision was opened for this page.

What a person in any of these categories should do. That is a question for a qualified defense counsel who knows the facts.

Sources

Every category above is quoted from the statute. Article 2 was amended after the 2023 edition of the Code: Pub. L. 118–159 inserted “20601 or” into entry (14) on 23 December 2024, and that change is carried above.

• 10 U.S.C. 802 · Article 2, Persons subject to this chapter · all fourteen categories, plus subsections (b), (c) and (d), and the 2024 amendment note
• 10 U.S.C. 803 · Article 3, Jurisdiction to try certain personnel · the status-transition rule quoted above and its three further subsections
• 10 U.S.C. chapter 47 · the 2023 edition · used for the surrounding text; it does not carry amendments made after 2023

What this page did not open. No court decision interpreting Article 2 was opened, and the case law on retiree and Fleet Reserve jurisdiction is substantial. Service regulations that define termination of active service were also not opened.

Checked on 19 September 2026, and checked for currency as well as for accuracy. Every statutory provision cited on this page was traced to the current United States Code: where a provision has not been amended since the 2023 edition, that edition’s text is the current text and its amendment record was read to confirm it; where a provision was amended by Pub. L. 118–159 (23 December 2024) or Pub. L. 119–60 (18 December 2025), the current text is quoted above and the amending Act is named beside it. The two Acts’ own texts were read to establish the complete list of provisions in this chapter that they changed. This was done through the Cornell mirror of the Code and through the Acts as published by the Government Publishing Office; the House preliminary Code could not be reached from here, so no third source confirms it. No independent expert review has taken place yet, and this page says so rather than implying one.