Police in Western Australia have greater powers to shoot to kill during terror incidents under laws passed by the state's upper house.
It means officers have legal protection to take pre-emptive action if the incident is declared by the police commissioner to be terror-related.
"I hope these laws never have to be used, but if the worst occurs, our police will be ready to respond," Premier Mark McGowan said in a statement after the bill passed on Thursday.
It follows similar moves in NSW and Victoria stemming from inquest recommendations after the deadly 2014 Lindt Cafe siege.
"These new laws ensure our police have sufficient legal protection if pre-emptive force is required to save hostages in a potential terrorism incident," Police Minister Michelle Roberts said.
In March, Police Commissioner Chris Dawson said officers would "have to form a reasonable belief that this action to use lethal force in a pre-emptive way, in a planned and co-ordinated operation, is necessary in the circumstances".
A NSW coroner's report after the Lindt Cafe siege found a lack of clarity among police about when lethal force could be used contributed to the tragedy.
Australian Associated Press