(a) The fact that OWCP may have erred in making the overpayment, or that the overpayment may have resulted from an error by another Government agency, does not by itself relieve the individual who received the overpayment from liability for repayment if the individual also was at fault in accepting the overpayment.

(b) However, OWCP may find that the individual was not at fault if failure to report an event affecting compensation benefits, or acceptance of an incorrect payment, occurred because:

(1) The individual relied on misinformation given in writing by OWCP (or by another Government agency which he or she had reason to believe was connected with the administration of benefits) as to the interpretation of a pertinent provision of the FECA or its regulations; or

(2) OWCP erred in calculating cost-of-living increases, schedule award length and/or percentage of impairment, or loss of wage-earning capacity.