An agency head shall establish the following with respect to each group of full-time employees to whom this chapter applies:
The scheduled tour of duty shall be the total number of regularly scheduled hours of duty a week, including standby time, and excluding time allowed for sleep and meals.
An agency head may provide for the allowance of a specific number of hours out of each twenty-four (24) hours at the official duty station for sleep and meals; however, the time allowed for sleep and meals need not be specifically identified.
An employee who works two (2) shifts that begin within the same twenty-four hour (24-hour) period in the basic workweek shall be paid for two (2) days of work at the regular basic pay rate - the first (1st) shift being counted as of the day on which it begins and the second (2nd) shift as of the day on which it ends.
The occurrence of holidays shall not affect the designation of the basic workweek.
D.C. Mun. Regs. tit. 6, r. 6-B1203