The Moderator of the General Assembly is the chairperson of a General Assembly, the highest court of a presbyterian or reformed church. Kirk Sessions and Presbyteries may also style the chairperson as moderator. Presbyterian churches are ordered by a presbyterian polity, including a hierarchy of councils or courts of elders, from the local church (kirk) Session through presbyteries (and perhaps synods) to a General Assembly. Many moderators act as ambassadors for their general assembly when it is not sitting, and visit many of the local churches in their denomination.