According to the research of É. Rebillard (1991: 99-108) the earliest evidence of viaticum can be found only at the end of 4th c. It becomes more common during the 5th c. together with the rising awareness that every dying Christian should have a chance to be reconciled. However, in the earliest usage of the word viaticum there is a tendency to distinguish the penitential reconciliation from the communion received by the dying person (e.g. Ep. 1.5 of Pope Siricius to Himerius, bishop of Tarragona, where munus viaticum is considered a consolation and an act of grace for the dying person in the state of sin). In the present canon of the Council of Gerona those reservations are not present and the viaticum is considered equal to the deathbed penance and reconciliation (Paxton 1996: 52-53).
Canon 9 should be also read in the context of the discussion as to whether it is possible to have a clerical career after the penance. The fathers of the Council of Gerona decided that the performance of penance itself (in this case the deathbed penance) is not an impediment to ordination in contrast to the public confession of mortal sin (Hillner 2015: 301, n. 83). See also Canon 9b of the Council of Gerona [175].