Department of Defense Instruction 3020.46: The Militarily Critical Technologies List (MCTL) [open pdf - 94KB]
"This Instruction, under the authority of DoD Directive 5134.01 (Reference (a)), establishes policy, assigns responsibilities, and prescribes procedures for developing and maintaining the MCTL as initially mandated by section 2401 et seq. of title 50, United States Code (also known as the Export Administration Act of 1979) (Reference (b)), and extended via section 1701 et seq. of Reference (b) (the International Economic Emergency Powers Act). This Instruction applies to OSD, the Military Departments, the Office of the Chairman of the Joint Chiefs of Staff and the Joint Staff, the Combatant Commands, the Defense Agencies, the DoD Field Activities, and all other organizational entities of the Department of Defense (hereafter referred to collectively as 'the DoD Components')."
DoD Directive 3020.46; DoDD 3020.46