OOOOH you ^MONKEY!"
Section 576 (took me ages to find it!!!!)
I think the excerpt you quoted is wrong when you look at this (from the act itself). A parent is defined as per the Children Act 1989 - if he gets Parental Responsibility he can then have a say in it by the looks of things.
Meaning of "parent". 576. - (1) In this Act, unless the context otherwise requires, "parent", in relation to a child or young person, includes any person-
(a) who is not a parent of his but who has parental responsibility for him, or
(b) who has care of him,
except that in the provisions mentioned in subsection (2) it only includes such a person if he is an individual.
(2) Those provisions are-
(a) sections 78(3), 81(4), 162, 186 to 188, 190, 200, 223, 226 and 228; and
(b) paragraph 7(2) and (7) of Schedule 8, paragraph 7(1) of Schedule 9, Schedule 18, paragraph 8 of Schedule 23 and Schedule 24.
(3) In subsection (1) "parental responsibility" has the same meaning as in the Children Act 1989.
(4) In determining for the purposes of subsection (1) whether an individual has care of a child or young person, any absence of the child or young person at a hospital or boarding school and any other temporary absence shall be disregarded.