D.C. Mun. Regs. tit. 22, r. 22-B6922
The owner or person having possession of any registered radiation machine shall re-register the machine with the Director every two (2) years.
The application for re-registration shall be submitted at least thirty (30) days prior to the expiration of the registrant's current Notice of Registration.
When a registrant has filed an application not less than thirty (30) days prior to the expiration of his or her existing registration, and when the application has been filed in the proper form for renewal or amendment of the application, the existing registration shall be valid until a final decision has been made on the application by the Director.
The registrant shall notify the Director within thirty (30) days of any change that renders the information furnished by him or her no longer accurate.
A change in the ownership, possession, or address where a radiation machine is located shall terminate a registration.
D.C. Mun. Regs. tit. 22, r. 22-B6922