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 issues exists, and a group I or group II
deficiency does not apply, this TCA applies.