In relation to the Commonwealth Scheme for Compensation for Detriment caused by Defective Administration (CDDA Scheme), defined as:
a specific and unreasonable lapse in complying with existing administrative procedures that would normally have applied to the claimant's circumstances or
an unreasonable failure to institute appropriate administrative procedures to cover a claimant's circumstances or
giving advice to (or for) a claimant that was, in all circumstances, incorrect or ambiguous or
an unreasonable failure to give to (or for) a claimant, the proper advice that was within the official's power and knowledge to give (or was reasonably capable of being obtained by the official to give).