Regulation 77 of the Principal Regulations is amended as follows:(a) by omitting ", owing to a miscalculation or to a mistake of fact for which the person is not responsible," ;(b) by omitting paragraph (b) and substituting the following paragraph:(b) the Board may write off the whole or any part of the excess amount so paid if it is satisfied that (i) forcing that person to repay the excess amount would impose on him or her undue financial hardship or would be inequitable; and(ii) the payment of the excess amount was not due to the fault of the person.