appointed as vicars general or episcopal vicars are freely appointed or removed by the diocesan bishop, and are appointed for a fixed duration. They lose their office when the term expires, or when the episcopal see falls vacant (sede vacante). Auxiliary bishops may also be removed from the office of vicar general, but must at least be appointed episcopal vicar. An auxiliary bishop who is an episcopal vicar, or a coadjutor bishop who is vicar general, may only be removed from office for a grave reason. Likewise, while they lose their vicar general or episcopal vicar office title sede vacante, they retain the powers of the office—specifically, those powers that can still be exercised while the see is vacant—until the succeeding bishop takes over the diocese. A coadjutor bishop has the right of succession, so if the see falls vacant he becomes the diocesan bishop immediately. These offices should not be confused with the vicar forane or "dean/archpriest", as such vicars do not have ordinary executive power. The appointment of a vicar general is also a useful tool for a diocesan bishop who has additional functions attached to his episcopate. The most notable example is in the diocese of Rome. The Pope is 'ex officio' the diocesan bishop of Rome, but spends most of his time governing the Latin Church and the global Catholic Church. His vicar general therefore functions as the de facto bishop of the diocese. The Vicar General of Rome also serves the same role for the suburbicarian diocese of Ostia, the traditional see of the Dean of the College of Cardinals, ever since it was merged with the diocese of Rome. The Vicar General of Rome, who is normally a cardinal, known as the Cardinal Vicar, is one of the few church officials in Rome to remain in office sede vacante. The current Vicar General of Rome is Cardinal Angelo De Donatis. A similar example is found in the United States. The archbishop of New York functioned also as ordinary of the military services from World War I until the 1980s: in addition to being responsible for the archdiocese of New York, the same archbishop was also responsible for the Military Ordinariate. This had the status of an apostolic vicariate, and functioned as the equivalent of a diocese defined by quality (that is, all Catholic members of the U.S. military and their dependents) rather than by