Australia’s strongest gun reform since the Port Arthur massacre has become law. Here’s what you need to know

With more than 1.15m firearms, NSW has the most guns of any jurisdiction, ahead of Queensland (1.14m) and Victoria (974,000). Photograph: Dean Lewins/EPA

Parliament has passed some of the most significant changes to Australia’s guns laws since the 1996 Port Arthur massacre.

Spurred by last month’s Bondi beach terror attack, the new laws will toughen background checks and fund a national gun buy-back scheme.