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§ 121.0

United States Munitions List description and definitions

ITAR · Part 121

Local vocabulary for this part (Commerce Control List, Department of Defense, EAR, ECCN, and related Part 121 terms), including ASE, Secured ASE, and Survivability-enhanced aircraft — in force 2026-10-13 per FR 2026-17660, 91 FR 55457 (§ 121.0 at 91 FR 55461); displayed in eCFR from 2026-10-21. The USML reading conventions — asterisks for SME, the “(MT)” Missile Technology parenthetical, and paragraph (x) — are in § 120.10, not here. Read § 120.10 before treating a Category heading as the control.

MT legend and SME asterisks: § 120.10.
Definitions here are local to Part 121 and sit on top of Part 120 Subpart C.
eCFR § 121.0 (verbatim): ASE means Aircraft Survivability Equipment.
eCFR § 121.0 (verbatim): Secured ASE means a system or equipment that meets all of the following conditions: (1) Is one of the following defense articles designed for the purpose of aircraft survivability: (i) Directed/directional infrared countermeasures (DIRCM) systems; or (ii) Infrared or ultraviolet missile warning systems necessary for the operation of DIRCM; (2) Is incorporated into an aircraft; and (3) Employs anti-tamper measures to deter, delay, and detect access to, or exploitation of, critical system components and software.
eCFR § 121.0 (verbatim): Survivability-enhanced aircraft means a manned aircraft meeting all of the following criteria: (1) Prior to the modifications described in paragraph (2) of this definition, was an aircraft in production that: (i) Is not described on the USML; (ii) Is described only in ECCN 9A991.b; and (iii) Was issued either: (A) A type certificate by the U.S. Federal Aviation Administration as a transport airplane or small commuter airplane, or (B) An equivalent certification by the civil aviation authorities of one or more North Atlantic Treaty Organization member states or major non-NATO allies; (2) Has been modified to facilitate the incorporation of one or more items of secured ASE as defined in this section; (3) But for the modifications performed to incorporate secured ASE, would not be described in paragraph (a)(8) of USML Category VIII; and (4) Is not described in any USML paragraph other than paragraph (a)(8) of USML Category VIII.

eCFR (primary) · 22 CFR § 121.0 91 FR 55457 (FR Doc. 2026-17660) — § 121.0 at 91 FR 55461

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In this atlas

§ 121.1 § 120.10 § 120.36 EAR