

This principle precludes the possibility of litigation arising out of situations or facts dating from a period when a State could not have foreseen that the circumstances might give rise to legal proceedings. Provisions of a treaty do not bind a party in relation to any act or fact which took place, or any situation which ceased to exist before the treaty enters into force for that party. In conclusion, non-retroactivity of treaties seems well-established in international law. This view was abandoned in the twentieth century, and the modern presumption under international law is that treaties do not operate retroactively. In the nineteenth century, some countries such the United States maintained that, when a treaty was ratified, it would operate retroactively to the time of signature, at least with respect to inter-state obligations, as opposed to private rights. The fact that ratification imparts the binding force to a treaty seems to indicate that ratification has regularly no retroactive effect.

Normally treaties themselves indicate the date from which they will take effect, so the question is generally of theoretical interest. There is no unanimity on this issue amongst publicists. The question arises as to whether the effect of ratification can be retroactive, so as to make a treaty binding from the date it was duly signed by representatives. Retrospectivity can therefore be considered as a weak form of retroactivity. It therefore changes the law from what it would otherwise have been with respect to a prior event. It attaches new consequences for the future to an event that took place before the statute was enacted. It is prospective, but imposes new results in respect of a past event. It therefore operates backwards in that it changes the law from what it was.Ī retrospective statute operates for the future only. A retroactive statute operates as of a time prior to its enactment. In our opinion, for New Zealand to apply the second commitment period of the Kyoto Protocol retrospectively and/or retroactively, there must be a clear provision for this in the amendment to the Kyoto Protocol. If you would like analysis of the domestic procedure required to provisionally apply a treaty, we will require more time.ģ. New Zealand has agreed to at least three other treaties provisionally entering force. However, there are some ways to make States liable for past events.Ģ. In the present context, it is unlikely that ‘ratification’ can be applied retroactively so as to make the signing of a treaty effectively the same as ratification of the treaty.

A retrospective statute operates for the future only. It therefore operates backwards in that it changes the law from what it was. Is it possible for New Zealand to retrospectively and/or retroactively apply the second commitment period of the Kyoto Protocol? What are the risks of New Zealand retrospectively/retroactively applying the second commitment period of the Kyoto Protocol in respect of ultimately ensuring ratification of the amendments to the Kyoto Protocol?ġ. Is it possible for New Zealand to provisionally apply the second commitment period of the Kyoto Protocol?ģ. What is the difference between retroactive and retrospective application of a treaty? Is it, in international law, possible to retroactively and/or retrospectively apply the second commitment period of the Kyoto Protocol?Ģ.
