### Question
How is the term computation base years defined?


### Answer
The term **computation base years** is defined in *42 U.S.C. § 415* as the following:

> the calendar years after 1950 and before—


(I) in the case of an individual entitled to old-age insurance benefits, the year in which occurred (whether by reason of section 402(j)(1) of this title or otherwise) the first month of that entitlement

#### Citation:
  - *42 U.S.C. § 415*
  - Heading: **CHAPTER 7-SOCIAL SECURITY > SUBCHAPTER II-FEDERAL OLD-AGE, SURVIVORS, AND DISABILITY INSURANCE BENEFITS**

