The FO has the primary responsibility for documenting required technical information including dates relevant to potential disability (and/or blindness) entitlement (e.g., protective filing date (PFD), disability date first insured (DFI), disability date last insured (DLI), or Potential Onset Date (POD)). If the FO does not provide the technical information, or a documentation issue exists, and a group I or group II deficiency does not apply, this TCA applies.