critical component
The term “critical component” includes such components, subsystems, systems, and related special tooling and test equipment essential to the production, repair, maintenance, or operation of weapon systems or other items of equipment identified by the President as being essential to the execution of the national security strategy of the United States. Components identified as critical by a National Security Assessment conducted pursuant to section 113(i) of title 10 or by a Presidential determination as a result of a petition filed under section 1862 of title 19 shall be designated as critical components for purposes of this chapter, unless the President determines that the designation is unwarranted.