(1)Falling within this section is—
(a)a decision set aside in a review under section 43 (see section 44(1)(b)),
(b)a decision in such a review, except a decision of the kind mentioned in subsection (2).
(2)That is, a decision made by virtue of section 44(2)(a), (3)(a) or (4) (and accordingly a decision so made is not an excluded decision).