Pub. L. 95-390, tit. I, under "definitions"
definitions
definitions Sec. 101. For purposes of this title— (1) the term “credit hours” means any hours, within a flexible schedule established under this title, which are in excess of an employee’s basic work requirement and which the employee elects to work so as to vary the length of a workweek or a workday; and (2) the term “overtime hours” means all hours in excess of 8 hours in a day or 40 hours in a week which are officially ordered in advance, but does not include credit hours.