As Minister Wilkinson explained, the focus of the legislation is on political and public accountability, so there is a legal obligation on the minister of the day to set targets, to develop a plan, to report on progress towards the target and to account for whether the target has been met. As such, the primary mechanism or means by which the act will be respected over time will be public, political and parliamentary accountability.
On May 17th, 2021. See this statement in context.