(1) If:
(a) a person has lodged a claim for a social security payment or a concession card under the 1991 Act before 20 March 2000; and
(b) the claim has not been determined before 20 March 2000;
the claim has effect, on and from 20 March 2000, as if it were a claim under this Act for the payment or card.
(2) If:
(a) subsection (1) applies to a claim; and
(b) the claim is granted under this Act;
the determination granting the claim may have a date of effect before 20 March 2000.
(3) If:
(a) subsection (1) applies to a claim; and
(b) the claim is granted under this Act; and
(c) the determination granting the claim has a date of effect before 20 March 2000;
the payment of instalments during the period that starts on the date of effect of the determination and ends on 19 March 2000 is taken to be made under this Act and the person making the claim has no rights under the 1991 Act arising from the claim.