Canon 353. §1 Cardinals assist the Supreme Pastor of the Church in collegial fashion particularly in Consistories, in which they are gathered by order of the Roman Pontiff and under his presidency. Consistories are either ordinary or extraordinary.

§2 In an ordinary Consistory all Cardinals, or at least those who are in Rome, are summoned for consultation on certain grave matters of more frequent occurrence, or for the performance of especially solemn acts.

§3 All Cardinals are summoned to an extraordinary Consistory, which takes place when the special needs of the Church and more serious matters suggest it.

§4 Only an ordinary Consistory in which certain solemnities are celebrated, can be public, that is when, in addition to the Cardinals, Prelates, representatives of civil states and other invited persons are admitted.

§1. Cardinales collegiali actione supremo Ecclesiae Pastori praecipue auxilio sunt in Consistoriis, in quibus iussu Romani Pontificis eoque praesidente congregantur; Consistoria habentur ordinaria aut extraordinaria.

§2. In Consistorium ordinarium convocantur omnes Cardinales, saltem in Urbe versantes, ad consultationem de quibusdam negotiis gravibus, communius tamen contingentibus, aut ad actus quosdam maxime sollemnes peragendos.

§3. In Consistorium extraordinarium, quod celebratur cum peculiares Ecclesiae necessitates vel graviora negotia tractanda id suadeant, convocantur omnes Cardinales.

§4. Solum Consistorium ordinarium, in quo aliquae sollemnitates celebrantur, potest esse publicum, cum scilicet praeter Cardinales admittuntur Praelati, legati societatum civilium aliive ad illud invitati.