D.C. Mun. Regs. tit. 22, r. 22-C5602
A registered medical marijuana dispensary may operate, sell, and deliver medical marijuana on any day and at any time except between the hours of 9:00 p.m. and 7:00 a.m.
A registered cultivation center or testing laboratory shall not be open to the public.
In the event that a registered cultivation center and registered dispensary are located in the same building, the portion of the building occupied by the cultivation center shall be closed to the public.
A cultivation center may operate its business twenty-four (24) hours a day.
A testing laboratory may operate on any day and at any time except between the hours of 9:00 p.m. and 5:00 a.m.
A registered cultivation center or its contracted agent may deliver to medical marijuana dispensaries on any day and at any time except between the hours of 9:00 p.m. and 7:00 a.m.
A registered testing laboratory or its contracted agent may collect medical marijuana samples from a cultivation center on any day and at any time except between the hours of 9:00 p.m. and 5:00 a.m.
A registered cultivation center or testing laboratory shall permit only a registered director, officer, member, incorporator, agent, manager, employee, or government or law enforcement official on the registered premises.
The Board may further limit the hours of operation for a cultivation center, dispensary, or testing laboratory on a case-by-case basis as a condition of registration in response to written comments received from an ANC in the affected ward, or as the result of the dispensary, cultivation center, or testing laboratory's failure to comply with the Act, or this subtitle.
D.C. Mun. Regs. tit. 22, r. 22-C5602