UCMJ Article 111 Drunken Operation vs Article 112 Drunk on Duty: Impaired Driving vs Impaired Performance
On this page: 5 sections
Sitting drunk behind the wheel of a parked car, keys in or near the ignition, can be enough for the impaired-operation offense, and that offense is no longer Article 111. Since January 1, 2019, drunken, impaired, or reckless operation of a vehicle, aircraft, or vessel has been Article 113; Article 111 covers leaving the scene of a vehicle accident. Article 112 punishes being drunk on duty, being incapacitated for duty by alcohol or drugs, and being drunk as a prisoner.
Article 113 looks at control of a vehicle, aircraft, or vessel. Article 112 looks at the duty.
Article 113
Article 113(a) applies to any person subject to the UCMJ who:
(1) operates or physically controls any vehicle, aircraft, or vessel in a reckless or wanton manner or while impaired by a substance described in section 912a(b) of this title (article 112a(b)), or
(2) operates or is in actual physical control of any vehicle, aircraft, or vessel while drunk or when the alcohol concentration in the person’s blood or breath is equal to or exceeds the applicable limit under subsection (b),
Source: 10 U.S.C. § 913(a) (Article 113).
The elements are operating or physically controlling a vehicle, aircraft, or vessel, and doing so recklessly or wantonly, while drunk or impaired, or at or above the alcohol limit; injury to a person is an added element when charged (MCM, Part IV, ¶ 51.b).
Operation and physical control
- Operating includes driving or guiding the vehicle while in motion, and also setting its motive power in action or manipulating its controls so as to make it move (¶ 51.c(4)).
- Physical control means “the present capability and power to dominate, direct, or regulate” the vehicle, vessel, or aircraft, “regardless of whether” it is operated. An intoxicated person in the driver’s seat with the keys in or near the ignition and the engine off “could be deemed in actual physical control”; a person asleep in the back seat with the keys in a pocket would not be (¶ 51.c(5)).
Drunk, impaired, and the alcohol limit
“Drunk and impaired mean any intoxication which is sufficient to impair the rational and full exercise of the mental or physical faculties”; drunk refers to alcohol, impaired to a controlled substance (¶ 51.c(6)). Separately, the statute makes the alcohol concentration itself an offense. In the United States, the limit is the lower of the limit of the state where the conduct occurred and 0.08 grams per 100 milliliters of blood or per 210 liters of breath. Outside the United States, the limit is 0.08, or a lower limit the Secretary of Defense sets by regulation (10 U.S.C. § 913(b)). The statute sets no higher limit.
Injury and separate charges
For the higher maximum, the operation must be a proximate cause of the injury, though not necessarily the sole or immediate cause (¶ 51.c(9)). Drunken operation and reckless operation are separate offenses that may be charged separately, and evidence of one may be relevant to the other (¶ 51.c(10)). The Manual defines vehicle, vessel, and aircraft by reference to 1 U.S.C. § 4, 1 U.S.C. § 3, and 18 U.S.C. § 31(a)(1) (¶ 51.c(1)-(3)).
Article 112
Article 112 has three offenses (10 U.S.C. § 912; MCM, Part IV, ¶ 49):
- Drunk on duty, 112(a). The accused must be drunk while actually on the duty; becoming drunk before going on duty does not change guilt. A person who never undertakes the duty, or who is absent from it and drunk, is outside this subsection. Standby duty counts, such as an aircrew ordered to stand by for flight.
- Incapacitation for duty from drunkenness or drug use, 112(b). The accused was unfit or unable to perform assigned duties because of previous alcohol or drug use; illness from that use is an example. Lack of knowledge of the assigned duties is an affirmative defense.
- Drunk prisoner, 112(c).
For Article 112, “drunk” means intoxication sufficient to impair the rational and full exercise of mental or physical faculties, or meeting or exceeding 0.08 grams per 100 milliliters of blood or 0.08 grams per 210 liters of breath (¶ 49.c(1)(a)). Two defenses are named for drunk on duty: superiors knew the accused was drunk when assigning the duty and let the accused assume it anyway, or the drunkenness came from an accidental overdose given for medicinal purposes (¶ 49.c(1)(d)).
How the facts sort
| Article 113 | Article 112(a) | Article 112(b) | |
|---|---|---|---|
| What must be controlled or performed | A vehicle, aircraft, or vessel | A military duty | Assigned duties |
| Condition | Drunk, impaired, over the limit, or reckless | Drunk while on the duty | Incapacitated by earlier drinking or drug use |
| On duty required | No | Yes | Duties must have been assigned |
| Off-duty conduct covered | Yes | No | The incapacitation must affect duty |
For example, a service member who drives home drunk from an off-base party on a Saturday faces Article 113 only; no duty was involved. A driver assigned to move a military truck across the motor pool who does so while drunk raises both Article 113 and Article 112(a), because the driving was the duty. If the same service member instead arrives for a Monday morning shift still too hung over to work, Article 112(b) is the relevant offense. Whether a person was drunk, and whether the person was on duty in the sense of ¶ 49.c(1)(b), are matters of proof in each case.
Maximum punishments
| Offense | Maximum (MCM, Part IV, ¶ 51.d and ¶ 49.d) |
|---|---|
| Drunken, impaired, or reckless operation, or operation over the limit, no personal injury | Bad-conduct discharge, forfeiture of all pay and allowances, 6 months |
| The same, resulting in personal injury | Dishonorable discharge, forfeiture of all pay and allowances, 18 months |
| Drunk on duty | Bad-conduct discharge, forfeiture of all pay and allowances, 9 months |
| Incapacitation for duty from drunkenness or drug use | Confinement for 3 months and forfeiture of two-thirds pay per month for 3 months |
| Drunk prisoner | Confinement for 3 months and forfeiture of two-thirds pay per month for 3 months |
In a general or special court-martial where every finding of guilty is for an offense committed after December 27, 2023, the military judge sets the sentence, capital cases aside (10 U.S.C. § 853(b)(1)).
Sources
- 10 U.S.C. § 913, drunken or reckless operation of a vehicle, aircraft, or vessel (Article 113)
- 10 U.S.C. § 912, drunkenness and other incapacitation offenses (Article 112)
- 10 U.S.C. § 911, leaving scene of vehicle accident (Article 111)
- 10 U.S.C. § 853, findings and sentencing (Article 53)
- Manual for Courts-Martial, United States (2024 edition), Part IV, ¶ 49 and ¶ 51.
This explains Articles 112 and 113 as written and interpreted in the Manual; it is not an assessment of any stop, test, or duty status. This page reflects the UCMJ as amended through Public Law 119-60 (December 18, 2025) and the Manual for Courts-Martial (2024 edition) as amended by Executive Order 14130.