### Question
How is the "defense feature" defined?


### Answer
The term **defense feature** is defined in *10 U.S.C. § 9511* as follows -

> equipment or design features included or incorporated in a civil aircraft which ensures the compatibility of such aircraft with the Department of Defense airlift system

#### Citation:
  - *10 U.S.C. § 9511*
  - Heading: **Subtitle D-Air Force > PART IV-SERVICE, SUPPLY, AND PROCUREMENT > CHAPTER 931-CIVIL RESERVE AIR FLEET**

