### Question
How is the term air traffic controller” or “controller defined?


### Answer
The term **air traffic controller” or “controller** is defined in *5 U.S.C. § 8335* as the following:

> given to it under section 8331(29)(A).[1](#8335_1_target)


(b)(1) A law enforcement officer, firefighter, nuclear materials courier, or customs and border protection officer who is otherwise eligible for immediate retirement under section 8336(c) shall be separated from the service on the last day of the month in which that officer, firefighter, or courier, as the case may be, becomes 57 years of age or completes 20 years of service if then over that age. 

#### Citation:
  - *5 U.S.C. § 8335*
  - Heading: **PART III-EMPLOYEES > Subpart G-Insurance and Annuities > CHAPTER 83-RETIREMENT > SUBCHAPTER III-CIVIL SERVICE RETIREMENT**

