Bishops and eparchies in Lumen Gentium and in Christus Dominus. The eparchial bishops, the coadjutor and auxiliary bishops, the eparchial synod, the eparchial curia, the, impeded and vacant sees, the protopresbyter, parish priest and parochial vicar, rectors of churches, exarchies and exarchs and assemblies of hierarchs of several sui iuris Churches.