Pub. L. 89-554, tit. 5, pt. III, subpt. D, ch. 55, subch. V, sec. 5543
Compensatory time off
§ 5543. Compensatory time off (a) The head of an agency may— (1) on request of an employee, grant the employee compensatory time off from his scheduled tour of duty instead of payment for an equal amount of time spent in irregular or occasional over-time work; and (2) provide that an employee whose rate of basic pay is in excess of the maximum rate of basic pay for GS-9 shall be granted compensatory time off from his scheduled tour of duty equal to the amount of time spent in irregular or occasional overtime work instead of being paid for that work under section 5542 of this title. (b) The Architect of the Capitol may grant an employee paid on an annual basis compensatory time off from duty instead of overtime pay for overtime work.