### Question
What does extended duty mean?


### Answer
**Extended duty** has the following meaning in *26 U.S.C. § 121*:

> any period of active duty pursuant to a call or order to such duty for a period in excess of 90 days or for an indefinite period

#### Citation:
  - *26 U.S.C. § 121*
  - Heading: **Subtitle A-Income Taxes > CHAPTER 1-NORMAL TAXES AND SURTAXES > Subchapter B-Computation of Taxable Income > PART III-ITEMS SPECIFICALLY EXCLUDED FROM GROSS INCOME**

