### Question
How does the law define mission critical system?


### Answer
Under *44 U.S.C. § 3532*, **mission critical system** is defined as:

> any telecommunications or information system used or operated by an agency or by a contractor of an agency, or other organization on behalf of an agency, that—


(A) is defined as a national security system under section 5142 of the Clinger-Cohen Act of 1996 (40 U.S.C. 1452)

#### Citation:
  - *44 U.S.C. § 3532*
  - Heading: **CHAPTER 35-COORDINATION OF FEDERAL INFORMATION POLICY > SUBCHAPTER I-FEDERAL INFORMATION POLICY > SUBCHAPTER II-INFORMATION SECURITY**

