4. The circumstances are that—
(a)the appeal will be an appeal under section 20(1)(a) or (b) of the Act;
(b)the determination made by the Secretary of State in making the decision to be appealed against included a determination that a particular person (whether the applicant or some other person) either was, or was not, a parent of the qualifying child in question (“a parentage determination”); and
(c)the ground of the appeal will be that the decision to be appealed against should not have included that parentage determination.