TAXATION (INTEREST ON OVERPAYMENTS AND EARLY PAYMENTS) ACT 1983
(a) an assessment is made under the Superannuation Contributions Tax (Assessment and Collection) Act 1997 in respect of a person's liability to pay superannuation contributions surcharge or an advance instalment; and
(b) the person has paid the assessed amount of the surcharge or instalment; and
(c) the assessment is amended (otherwise than under section 18 of that Act) reducing the liability of the person to pay surcharge or the instalment;
interest is payable by the Commissioner to the person in accordance with this Part on the amount by which the surcharge or instalment payable by the person under the amended assessment is less than the surcharge or instalment that was paid by the person under the assessment that was amended.