### Question
How does the law define materials critical to national security?


### Answer
Under *10 U.S.C. § 187*, **materials critical to national security** is defined as:

> materials—


(A) upon which the production or sustainment of military equipment is dependent

#### Citation:
  - *10 U.S.C. § 187*
  - Heading: **Subtitle A-General Military Law > PART I-ORGANIZATION AND GENERAL MILITARY POWERS > CHAPTER 7-BOARDS, COUNCILS, AND COMMITTEES**

