### Question
How does the law define milestone B decision?


### Answer
Under *10 U.S.C. § 4231*, **milestone B decision** is defined as:

> the decision to approve the system development and demonstration of a major system by the official of the Department of Defense designated to have the authority to make that decision

#### Citation:
  - *10 U.S.C. § 4231*
  - Heading: **Subtitle A-General Military Law > PART V-ACQUISITION > Subpart F-Major Systems, Major Defense Acquisition Programs, and Weapon Systems Development > CHAPTER 322-MAJOR SYSTEMS AND MAJOR DEFENSE ACQUISITION PROGRAMS GENERALLY > SUBCHAPTER II-CONTRACTING**

