(1) If, because an assessment is amended, a person's liability to superannuation guarantee charge is reduced:
(a) the amount by which the charge is reduced is taken, for the purposes of section 49, never to have been payable; and
(b) the Commissioner must:
(i) refund any overpaid amount; or
(ii) apply any overpaid amount against the person's liability (if any) to the Commonwealth and refund any part of the amount that is not so applied.
(2) In subsection (1):
"overpaid amount" includes any overpaid amount of additional superannuation guarantee charge under section 49 or Part 7 of this Act or administrative penalty under Part 4-25 in Schedule 1 to the Taxation Administration Act 1953 .