USML Category IV: rockets, missiles and munitions

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1. Rockets, missiles and munitions

Category IV of the United States Munitions List (USML) covers "Launch Vehicles, Guided Missiles, Ballistic Missiles, Rockets, Torpedoes, Bombs, and Mines" (22 CFR 121.1). Paragraph (a), marked with an asterisk, lists twelve kinds of end item. They are rockets, space launch vehicles and missiles, in several groups, then bombs, torpedoes, depth charges, land mines, anti-helicopter mines, naval mines, and fragmentation and high explosive hand grenades. The asterisk makes them Significant Military Equipment under the International Traffic in Arms Regulations (ITAR) (22 CFR 120.10).

Many Category IV entries also carry the annotation (MT). That marks the defense articles on the Missile Technology Control Regime (MTCR) Annex (22 CFR 120.10). Within Category IV the annotation often applies only to the versions of an item usable in the systems of paragraphs (a)(1) or (a)(2) (22 CFR 121.1).

2. Payload and range

The first two entries divide rockets, space launch vehicles and missiles by what they can carry and how far (22 CFR 121.1). Paragraph (a)(1) covers those capable of delivering at least a 500-kg payload to a range of at least 300 km. Paragraph (a)(2) covers those delivering less than a 500-kg payload to at least 300 km. Both carry the (MT) annotation. Man-portable air defense systems (MANPADS) and anti-tank missiles and rockets have their own entries, and paragraph (a)(5) catches rockets, space launch vehicles and missiles meeting none of the earlier criteria.

Notes define the two measures (22 CFR 121.1). Range is the maximum distance the system can travel in stable flight, measured along the projection of its trajectory over the Earth’s surface. It is based on design capability when fully loaded with fuel or propellant, independent of operational restrictions or telemetry limits, using the range-maximizing trajectory in standard atmosphere with zero wind. Payload is the total mass the rocket, vehicle or missile can carry or deliver that is not used to maintain flight.

Two further notes set limits (22 CFR 121.1). A mine means a munition placed under, on or near the ground or another surface and designed to be exploded by the presence, proximity or contact of a person or vehicle. Model and high power rockets and kits made of paper, wood, fiberglass or plastic, with no substantial metal parts, are excluded if designed to fly on consumer-certified hobby motors. Such rockets must not contain active controls.

3. Launchers and handling equipment

Paragraph (b), also marked with an asterisk, covers fixed launch sites and mobile launcher mechanisms (22 CFR 121.1). Those for the paragraph (a)(1) and (a)(2) systems carry the (MT) annotation. Those for MANPADS, anti-tank weapons and other rockets and missiles are listed separately, with launch tables and TOW missile launchers as examples. Non-space launch vehicle launcher mechanisms for aircraft are controlled in Category VIII, and those integrated onto a vessel or ground vehicle in Categories VI and VII.

Paragraph (c) covers equipment specially designed for handling, controlling, activating, monitoring, detecting, protecting, discharging or detonating the articles in paragraphs (a) and (b), or improvised explosive devices (22 CFR 121.1). A note says it includes transporters, cranes and lifts for launch preparation, specially designed robots and robot controllers, and specially designed liquid propellant tanks. Aircraft missile protection systems are sent to Category XI.

4. Power plants and warheads

Paragraph (d), with an asterisk, covers power plants for rockets, space launch vehicles and missiles (22 CFR 121.1). It includes individual rocket stages, and solid, hybrid, gel or liquid motors and engines at stated total impulse thresholds, which carry the (MT) annotation. It also includes combined cycle, pulsejet, ramjet and scramjet engines, air-breathing engines operating above Mach 4, and pressure gain combustion propulsion. A final entry catches other engines and motors not listed there or in Category XIX. Consumer-certified model rocket motors with no more than 5 pounds of propellant are excluded, and so are thrusters for spacecraft.

Paragraphs (e) and (f) are reserved (22 CFR 121.1). Paragraph (g), with an asterisk, covers non-nuclear warheads for rockets, bombs and missiles, with explosive, kinetic, electromagnetic pulse, thermobaric, shape charge and fuel air explosive types given as examples.

5. Systems, parts and components

Paragraph (h) runs to thirty entries (22 CFR 121.1). They include flight control and guidance systems, seeker systems, kinetic kill vehicles, thrust vector control systems and MANPADS grip stocks. Nozzles, nose tips, heat shields, safing and arming components, self-destruct systems and separation mechanisms are listed, as are post-boost vehicles, combustion chambers, injectors and igniters. Re-entry vehicles, penetration aids, motor cases and liners, radomes, payload fairings, launch canisters, fuzes, propellant tanks, altimeters and connectors complete the list. Many carry the (MT) annotation for the versions usable in the paragraph (a)(1) or (a)(2) systems. The last entry, with an asterisk, catches anything classified, containing classified software tied to defense articles or 600 series items, or developed using classified information.

A note to the re-entry vehicle entry says it does not control spacecraft (22 CFR 121.1). Spacecraft are controlled in Category XV and, if not described there, under Export Control Classification Number 9A515 on the Commerce Control List.

6. Technical data and launch services

Paragraph (i) controls technical data and defense services directly related to paragraphs (a) to (h) (22 CFR 121.1). It adds two services that apply whatever the jurisdiction, ownership or origin of the hardware, and whether or not technical data is used. One is assistance to a foreign person in integrating a satellite or spacecraft with a launch vehicle, including planning and onsite support. The other is assistance in the failure analysis of a launch vehicle. The paragraph points to separate special export controls for spacecraft and launches.

A closing note deals with systems that contain MTCR items (22 CFR 121.1). If an MTCR Category I item is included in a system, the whole system is considered a Category I item, unless the incorporated item cannot be separated, removed or duplicated. Paragraph (x) again provides for items under the Export Administration Regulations shipped on the same license.

Key terms

(MT) annotation	The marker for defense articles on the Missile Technology Control Regime Annex.
Range	Maximum distance in stable flight, measured over the Earth’s surface on the range-maximizing trajectory.
Payload	The total mass a rocket or missile can carry or deliver that is not used to maintain flight.
MANPADS	Man-portable air defense systems, listed separately with their grip stocks.
Mine	A munition placed on or near a surface and exploded by a person or vehicle.

Every statement above links to the document behind it. The full source list for this piece is on the sources page.

This page describes public United States government programs for general information. It is not legal, regulatory or procurement advice, and it does not address the facts of any particular case.

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