Taxation (Interest on Overpayments and Early Payments) Act 1983
(a) the Commissioner has allocated a BAS amount or petroleum resource rent tax amount to an RBA of an entity; and
(b) section 12AB does not apply (that section is about remission of penalties); and
(c) under subsection 8AAZLF(1) of the Taxation Administration Act 1953 , the Commissioner is required to refund to the entity the whole or part of an RBA surplus for that RBA; and
(d) the refund takes place after the RBA interest day;
then interest is payable by the Commissioner to the entity on the amount refunded.
Section 12AF defines BAS amount , petroleum resource rent tax amount , RBA surplus and RBA interest day .