Abstract

This paper is about why voluntary associations, such as churches, unions and political parties, are subject to natural justice requirements in common law: in other words, why they are required to treat their members fairly. These requirements are typically imposed (under the name of procedural fairness) by public law on exercises of state authority, but voluntary associations do not exercise state authority. Voluntary associations are set up in private law, as structures of property and contract, but property and contract law do not ordinarily require rights to be exercised in accordance with natural justice. What is needed is an account which locates voluntary associations within private law while adverting to what they have in common with the state: that they make and apply rules to facilitate human interaction. I propose such an account, drawing on an idea from Lon Fuller. Natural justice requirements on voluntary associations are grounded in the rule of law.