AR 690-610 governs Department of the Army civilian policies for hours of duty, alternative work schedules, and holidays.
View AR 690-610 on armypubs.army.mil
AR 690-610 covers workweeks, work schedules, tours of duty, rest and lunch periods, nightwork, daylight saving time, and alternative work schedules. It also sets requirements for documenting tours, administering standby time, handling AWS changes, and compensating holiday work.
The DA Civilian administrative workweek is identical to the calendar week, beginning at 0001 on Sunday and ending at 2400 the following Saturday. (paragraph 2-1)
All time will be charged, credited, and/or reported in the timekeeping system in increments no less than 6 minutes. (paragraph 2-1)
Once established, an employees tour of duty must be documented in writing (for example, a memorandum to the employee, by email, or written paper copy), and include the calendar days and hours of the day that the employee will typically be expected to work. (paragraph 2-1)
Rest periods may not exceed 15 minutes during any 4hour period of continuous work, and should not be taken in increments smaller than 5 minutes. (paragraph 2-1)
In order to qualify as standby time, the employee must be officially ordered to remain at or within the confines of a designated post of duty, and the employees state of readiness to perform work must include substantial activity limitations so that the employee cannot use the time effectively for their own purposes. (paragraph 2-1)