Whereas the doctrine of public reason restricts the reasons to which we may appeal, the doctrine of public rules regulates the character of the requirements that principles of justice may produce.[65] More specifically, it states that we have weighty reasons to prefer principles of justice that can serve as a public standard, in the senses that they are (i) not self-effacing; and yield demands (ii) that are sufficiently determinate and accessible, and (iii) compliance with which is sufficiently verifiable to others (Rawls 1996: 66–67; Rawls 1999a: 48–49; see also Williams 1998: 233). We explain each of these properties in turn.