(1) An approved provider may vary the claim made in respect of a * payment period within:
(a) 2 years after the end of that payment period; or
(b) such longer period as is determined in respect of the claim by the Secretary.
(2) In determining a longer period for the purposes of paragraph (1)(b), the Secretary must be satisfied that a variation is required:
(a) due to an administrative error made by the Commonwealth or an agent of the Commonwealth; or
(b) because the Commonwealth or an agent of the Commonwealth considers that the circumstances of a care recipient are different from those on the basis of which subsidy was claimed.
Note: Determinations of periods under paragraph (1)(b) are reviewable under Part 6.1.
(3) A determination made under paragraph (1)(b) is not a legislative instrument.