Often when we talk about treaties—one of the things we learn when we come here is that everything is interrelated and that when we pass legislation here, often it needs to be something that complies with our international treaty obligations. In 2018, New Zealand participated in negotiations that saw the adoption of the IMO GHG, the greenhouse gas strategy. So, of course, at that stage, New Zealand, by being part of that—the fact that we were one of only two countries, ourselves and Mexico, who hadn't actually signed up did, again, make us something of an outlier, and also made it very difficult for us to continue arguing for ambitious action to reduce maritime emissions—almost as though we were getting something of a free ride. So that's the background as to how we've arrived at where we are today.