50 USC 98h3 - Definitions

For the purposes of this subchapter:
(1) The term strategic and critical materials means materials that
(A)  would be needed to supply the military, industrial, and essential civilian needs of the United States during a national emergency, and
(B)  are not found or produced in the United States in sufficient quantities to meet such need.
(2) The term national emergency means a general declaration of emergency with respect to the national defense made by the President or by the Congress.