In this Division--
(a) an organisation is
"responsible" for a child if it (including any part of it) exercises care, supervision or authority over the child (or purports to do so or is obliged by law to do so), and
(b) if an organisation (including any part of it) delegates the exercise of care, supervision or authority over a child to another organisation (in whole or in part), each organisation is
"responsible" for the child.