In particular cases, usually because of illness or some other problem, an exarch of any rank can be assisted by the appointment of a colleague who is called Coadjutor exarch. The position of "coadjutor exarch" towards his superior exarch is similar to the position of Latin coadjutor bishop towards his superior diocesan bishop. Coadjutor exarchs are appointed with rights of succession. For example, in 1993 titular Bishop Christo Proykov of Briula was appointed Coadjutor to Apostolic Exarch of Sofia, Methodius Stratiev, and when the latter died in 1995 coadjutor exarch succeeded him as the new Apostolic Exarch.