No registrant shall store or keep any firearm on any premises under his or her control if he or she knows or reasonably should know that a minor or a person prohibited from possessing a firearm under D.C. Official Code § 22-4503 can gain access to the firearm.
When not in storage, each registrant shall carry the firearm on his or her person or within such close proximity that he or she can readily retrieve or use it as if he or she carried it on his or her person; provided, that the firearm is entirely hidden from view of the public.
If the firearm is stored at a place of business, it shall be stored in a gun safe, locked box, or other secure device affixed to the property.
D.C. Mun. Regs. tit. 24, r. 24-2348