Important details further down in that article (my bold/ital. added for emphasis):
Most anaphylactic attacks in children and teenagers are triggered by nuts. After a child died after eating a nut product made in a school food technology class in 2011, the NSW Department of Education has banned all nuts in any school activities, including camps, class projects and food technology classes. It does not require schools to impose blanket nut bans on students, but says individual schools many decide to implement them.