"The works of apsotolate are carried out in pilgrimages that are totally dependent on providence, ordinarily going two by two and without taking anything for the journey (cf. Luke 9:1- 6; Mark 6:6b-13) – as is also the case when the sisters travel in pairs, though they must have a brother accompany them; the apostolate is also carried out in parish missions of various types; in spiritual exercises requested by parishes; in giving testimonies (either previously organized or “as the Spirit moves”); and in the visits to the groups of prayer (cf. Ch. 3,9), in service to the local Churches."
(pfsgm statute, §1,11)