In presbyterianism, congregations are united in accountability to a regional body called the "presbytery, "or, in Continental Reformed terminology, the "classis", which comes from the Latin word for "fleet." Presbyteries are made up of the minister and an elder 'commissioned' from each parish, as well as other clergy, such as theological college professors, chaplains, and retired ministers. When there is a larger number of ordained ministers than ruling elders, additional ruling elders are appointed to redress the imbalance. The commissioners of the presbytery are expected to exercise their own judgement and are not required to represent the majority view of their congregations. In some Dutch Reformed bodies, a classis serves as a delegated body, which ceases to exist in between meetings, whereas a presbytery exists perpetually.