7SA person who is—
(a)a teacher at a relevant school (within the meaning of paragraph 8 below);
(b)a pupil at such a school;
(c)a parent of a pupil at such a school; or
(d)a member of a school council having functions in relation to such a school
shall not be a member of an appeal committee for consideration of a reference involving a question whether a child is to be placed in the specified school or excluded from the relevant school.