"Every time I've seen you there's never been an issue over bail," he said.
"You've earned people's trust at the moment. It's really important that you carry on with that."
He remanded the boy until next month for his next appearance.
Wellington High School was locked down last November after police received a "credible threat" about it.
In a statement at the time, police said the threat made reference to Wellington High School, which was placed into partial lockdown for around one hour as a precaution while the incident was dealt with.
"We know this incident has been worrying and we urge anyone with concerns about their safety or the safety of others to speak to police immediately to report it."