I'd also point to one of the requirements for the director-general to consider the cost. Modelling done—an assessment done a few years ago now suggests that the cost-effectiveness of fluoridation gets lower the smaller the population that is served by the water supply. It starts to look to be of lower value at water supplies that serve fewer than 500 people. Now, that isn't the only factor that the director-general has to consider, but for small water supplies, there may be a discussion about whether or not the costs of fluoridation are, in fact, worth the oral health benefits.