Then there is the cost to the ports themselves of providing the extra tankage and complying with rules that are included in this piece of legislation where officials might direct a port to provide tank storage or other receiving facilities for liquid waste and sludges that are removed from ships now. Currently, ports around New Zealand are severely constrained for space. Their infrastructure, in many cases, is marginal. In many cases, they are owned by local government publicly, and they don't have the capital that they need to actually invest in modernising their ports. This is not a situation where you can go back to your shareholders and say, "We need to build another wharf. It's $100 million. Pony up with the money, but guess what! Your rate of return's going to be 6 or 8 percent over the next few decades." They have to go back to the shareholder, being a council in many cases—a regional council or a city council—and beg elected members to give them the capital that could otherwise be spent on water infrastructure or roads or libraries or pools, and so on.