New laws have been passed to require priests to disclose reports of child sexual abuse obtained in the confessional.
Tasmania's upper house passed the bill on Tuesday morning, a day after the passage of similar laws was secured in the Victorian Parliament.
The bill also makes it a crime for anyone to fail to report child abuse to police if they reasonably believe that child abuse has occurred.
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Attorney-General Elise Archer said the laws were "nation-leading".
"Our legislation makes it clear that all members of the community must do everything in their power to protect children and prevent child abuse from occurring," she said.
"There is no excuse for failure to report the horrific abuse of children, least of all for institutions who have been named by the royal commission as failing to prevent child abuse in the past."
Archbishop of Hobart Julian Porteous said he did not believe the bill would strengthen protections for children and vulnerable people but, rather, have the opposite effect by making offenders less likely to confess to their crimes "for fear of being reported".
"This will deny priests the opportunity to encourage offenders to report themselves to police," he said.
Archbishop Porteous added that the church supported police and the courts bringing perpetrators to justice.