Presbyterianism is also distinct from congregationalism, in that individual congregations are not independent, but are answerable to the wider church, through its governing bodies (presbyteries, synods and assemblies). Moreover, the ordained ministry possesses a distinct responsibility for preaching and sacraments. Congregational churches are sometimes called "Presbyterian" if they are governed by a council of elders; but the difference is that every local congregation is independent, and its elders are accountable to its members, and congregationalism's wider assemblies are not ordinarily empowered to enforce discipline. Thus, these are ruled by elders only at the level of the congregations, which are united with one another by covenants of trust.