A role is an area of accountability defined by a domain and assigned to a person (the role keeper), who has autonomy to decide and act within the constraints of the role's domain. The role is like a hat, carried by a person – the role keeper. One person can fill several roles. The same role can be filled by more than one person. In some contexts, you carry one or more hats, and in others, you carry another hat. Role keepers are nominated and selected by consent for a limited term and peers support one another to develop in the roles they fulfil.