### Question
Can you define what base quarter means?


### Answer
**Base quarter** is defined as the following in *42 U.S.C. § 415*:

> (i) the calendar quarter ending on September 30 in each year after 1982, or (ii) any other calendar quarter in which occurs the effective month of a general benefit increase under this subchapter

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

