D.C. Mun. Regs. tit. 6, r. 6-B1272
The Mayor may, whenever he or she deems it to be appropriate in the public interest, authorize the early dismissal of employees, whereupon he or she shall notify agencies to dismiss, for a specified period of time, and grant administrative leave to, as many employees as the agency head determines to be practicable.
Agency heads and other personnel authorities may dismiss, and grant administrative leave to, employees due to the breakdown of heating or air conditioning equipment and other similar situations within one or more of the agency's or personnel authority's facilities.
Except as provided in Subsection 1272.5 of this section, whenever early dismissal has been authorized, all employees, except essential employees and emergency employees who have been activated subject to the provisions of Section 1271 of this chapter, shall be permitted to leave their assigned duty stations prior to the close of the normal workday, on administrative leave, if the following conditions are met:
An employee who previously requested and was granted leave for the entire day shall be charged leave for the entire day, regardless of the early dismissal.
If, after the notice of early dismissal, an employee requests and is granted leave, the employee shall be charged leave only for that period when leave commences, to the hour that early dismissal is authorized.
If, prior to the notice of early dismissal, an employee requests and is granted leave, but otherwise makes known his or her intention of returning to duty status at a time that precedes the end of his or her regular tour of duty, the employee shall be charged leave only for the period of time specified.
D.C. Mun. Regs. tit. 6, r. 6-B1272