### Question
What does materials critical to national security mean?


### Answer
**Materials critical to national security** has the following meaning in *10 U.S.C. § 139c*:

> given that term in section 187(e)(1) of this title.

#### Citation:
  - *10 U.S.C. § 139c*
  - Heading: **Subtitle A-General Military Law > PART I-ORGANIZATION AND GENERAL MILITARY POWERS > CHAPTER 4-OFFICE OF THE SECRETARY OF DEFENSE**

