### Question
Can you define what regular work day means?


### Answer
**Regular work day** is defined as the following in *5 U.S.C. § 5545a*:

> each day in the investigator's basic work week during which the investigator works at least 4 hours that are not overtime hours paid under section 5542 or hours considered part of section 5545a

#### Citation:
  - *5 U.S.C. § 5545a*
  - Heading: **PART III-EMPLOYEES > Subpart D-Pay and Allowances > CHAPTER 55-PAY ADMINISTRATION > SUBCHAPTER V-PREMIUM PAY**

