A determination, revised determination, decision, or revised decision may be reopened—
(b) Within two years of the date of the notice of the initial determination if we find good cause, as defined in § 416.1489, to reopen the case; or
(c) At any time if it was obtained by fraud or similar fault. In determining whether a determination or decision was obtained by fraud or similar fault, we will take into account any physical, mental, educational, or linguistic limitations (including any lack of facility with the English language) which you may have had at the time.
[45 FR 52096, Aug. 5, 1980, as amended at 59 FR 1637, Jan. 12, 1994]