43A.—(1) Subject to the provisions of this Order, any decision of the Department or an appeal tribunal made in accordance with the foregoing provisions of this Order shall be final.
(2) If and to the extent that regulations so provide, any finding of fact or other determination embodied in or necessary to such a decision, or on which such a decision is based, shall be conclusive for the purposes of—
(a)further such decisions;
(b)decisions made in accordance with Articles 9 to 16 of the Social Security (Northern Ireland) Order 1998 or section 22 of the Social Security Administration (Northern Ireland) Act 1992, or with regulations under Article 12 of that Order; and
(c)decisions made under the Vaccine Damage Payments Act 1979.]