Canon 352. §1 The Dean presides over the College of Cardinals. When he is unable to do so, the sub-Dean takes his place. The Dean, or the subDean, has no power of governance over the other Cardinals, but is considered as first among equals.

§2 When the office of Dean is vacant, those Cardinals who have a suburbicarian title, and only those, under the presidency of the sub-Dean if he is present, or of the oldest member, elect one of their number to act as Dean of the College. They are to submit his name to the Roman Pontiff, to whom it belongs to approve the person elected.

§3 In the same way as set out in §2, the sub-Dean is elected, with the Dean presiding. It belongs to the Roman Pontiff to approve also the election of the sub-Dean.
[See can. 350 §§1-2 above.]

§4 If the Dean and sub-Dean do not already have a domicile in Rome, they acquire it there.

§1. Cardinalium Collegio praeest Decanus, eiusque impediti vices sustinet Subdecanus; Decanus, vel Subdecanus, nulla in ceteros Cardinales gaudet potestate regiminis, sed ut primus inter pares habetur.

§2. Officio Decani vacante, Cardinales titulo Ecclesiae suburbicariae decorati, iique soli, praesidente Subdecano si adsit, aut antiquiore ex ipsis, e coetus sui gremio unum eligant qui Decanum Collegii agat; eius nomen ad Romanum Pontificem deferant, cui competit electum probare.

§3. Eadem ratione de qua in §2, praesidente ipso Decano, eligitur Subdecanus; Subdecani quoque electionem probare Romano Pontifici competit.

§4. Decanus et Subdecanus, si in Urbe domicilium non habeant, illud ibidem acquirant.