Expert witnesses will be called to give evidence at the week-long hearing.
The door and legislation surrounding its installation was the sole focus of a hearing in May, when survivors and police said the door – which was controlled by a mechanical and an electromagnetic lock – did not open during the March 15 shooting.
Al Noor worshippers Mohammad Siddiqui and Ahmad Alayedy said they kicked out the door’s bottom glass pane and crawled out instead.
“The evidence we’ve heard in this inquest is vital to fully understanding the circumstances of the deaths, in so far as the actions or inactions of the emergency response agencies and their staff on March 15, 2019 are relevant.
“Only with that understanding is it possible to consider if the response and the inevitable care gap could be improved in the future, despite our strongest desire that a response to such an attack will never again be needed on our shores,” she said.
The firearms licensing issue will be considered in a hearing set down for October.
On Friday the Government announced that it would not implement eight of the 44 recommendations of the Royal Commission of Inquiry into the March 15 terror attacks.
The Federation of Islamic Associations urged the Government to revisit its decision to wind up work on the commission’s response, while Labour accused the coalition of walking away from the Prime Minister’s commitment to victims and survivors.