I am not familiar with a Charter, DID/DOS. You do have to list the device and register your establishment. As far as design history, many class 1 devices are exempt from this. You have to check and see if yours is not.
Per 820.30(a) - The following class I devices are subject to design controls:
(i) Devices automated with computer software; and
(ii) The devices listed in the chart below.
Section Device
868.6810 Catheter, Tracheobronchial Suction
878.4460 Glove, Surgeon's
880.6760 Restraint, Protective
892.5650 System, Applicator, Radionuclide, Manual
892.5740 Source, Radionuclide Teletherapy