Canon 400. §1 Unless the Apostolic See has decided otherwise, in the year in which he is bound to submit the report to the Supreme Pontiff, the diocesan Bishop is to go to
Rome to venerate the tombs of the Blessed Apostles Peter and Paul, and to present himself to the Roman Pontiff.

§2 The Bishop is to satisfy this obligation personally, unless he is lawfully impeded; in which case he is to satisfy the obligation through the coadjutor, if he has one, or the auxiliary, or a suitable priest of his presbyterium who resides in his diocese.

§3 A Vicar apostolic can satisfy this obligation through a proxy, even through one residing in Rome. A Prefect apostolic is not bound by this obligation.

§1. Episcopus dioecesanus, eo anno quo relationem Summo Pontifici exhibere tenetur, nisi aliter ab Apostolica Sede statutum fuerit, ad Urbem, Beatorum Apostolorum Petri et Pauli sepulcra veneraturus, accedat et Romano Pontifici se sistat.

§2. Episcopus praedictae obligationi per se ipse satisfaciat, nisi legitime sit impeditus; quo in casu eidem satisfaciat per coadiutorem, si quem habeat, vel auxiliarem, aut per idoneum sacerdotem sui presbyterii, qui in sua dioecesi resideat.

§3. Vicarius apostolicus huic obligationi satisfacere potest per procuratorem etiam in Urbe degentem; Praefectus apostolicus hac obligatione non tenetur.