This chapter starts from the proposition that legal substance may be inherently connected to legal form. In particular, consideration is given to the claim that individualistic norms tend to be manifested in highly administrable rules while altruistic norms lend themselves to expression as standards in the legal system. An examination of specific standards in the international legal order that provide a regulatory space for altruism ensues. In doing so, the chapter builds on the insights offered in the previous chapters on substantive international law and reveals that there are certain common legal vehicles through which altruism is compelled or promoted by the law. In a context where the altruistic behaviour of individual states waxes and wanes, the chapter concludes by making a call for greater institutionalisation of altruism.