Canon 538. §1 A parish priest ceases to hold office by removal or transfer effected by the diocesan Bishop in accordance with the law; by his personal resignation, for a just reason, which for validity requires that it be accepted by the diocesan Bishop; and by the lapse of time if, in accordance with the particular law mentioned in can.
522, he was appointed for a specified period of time.

§2 A parish priest who is a member of a religious institute or is incardinated in a society of apostolic life, is removed in accordance with can. 682 §2.

§3 A parish priest who has completed his seventy fifth year of age is requested to offer his resignation from office to the diocesan Bishop who, after considering all the circumstances of person and place, is to decide whether to accept or defer it. Having taken account of the norms laid down by the Episcopal Conference, the diocesan
Bishop must make provision for the appropriate maintenance and residence of the priest who has resigned.

§1. Parochus ab officio cessat amotione aut translatione ab Episcopo dioecesano ad normam iuris peracta, renuntiatione iusta de causa ab ipso parocho facta et, ut valeat, ab eodem Episcopo acceptata, necnon lapsu temporis si, iuxta iuris particularis de quo in can. 522 praescripta, ad tempus determinatum constitutus fuerit.

§2. Parochus, qui est sodalis instituti religiosi aut in societate vitae apostolicae incardinatus, ad normam can. 682, §2 amovetur.

§3. Parochus, expleto septuagesimo quinto aetatis anno, rogatur ut renuntiationem ab officio exhibeat Episcopo dioecesano, qui, omnibus personae et loci inspectis adiunctis, de eadem acceptanda aut differenda decernat; renuntiantis congruae sustentationi et habitationi ab Episcopo dioecesano providendum est, attentis normis ab Episcoporum conferentia statutis.