There is no set universal rule for the training of clergy, and there is some variation among the local churches(autocephalous churches). Traditionally, candidates for the priesthood either reside with their bishops for a certain period and are given personal instruction by him, or, if they are monks, receive instruction by obedience to their monastic superiors. Modern practice in most places is for them to be trained at a [[seminary]], which may or may not be associated with a [[monastery]]. The course of study generally runs for about three years and an undergraduate degree is often a requirement for admission. Instruction is given in dogmatics, theology, ecclesiastical history, canon law, liturgics, Biblical studies, and other subjects, although emphasis varies from institution to institution. Graduation from a seminary is no guarantee of ordination, however; this is solely at the discretion of the [[diocese|diocesan]] bishop. Requirements for the training of those who intend to remain in the diaconate are often less rigorous than for priests.