I'll jump in again and say no. There would be no new legal obligation placed on the government of the day as a result of this amendment. This amendment would serve to signify to the public, to Parliament, that urgent early action and achievement of net zero is desired, but it would not have any specific legal implications for decision-making or for the government in implementing any of the provisions in the act.
On May 26th, 2021. See this statement in context.