Canon 545. §1 Whenever it is necessary or opportune for the due pastoral care of the parish, one or more assistant priests can be joined with the parish priest. As cooperators with the parish priest and sharers in his concern, they are, by common counsel and effort with the parish priest and under his authority, to labour in the pastoral ministry.

§2 An assistant priest may be appointed either to help in exercising the entire pastoral ministry, whether in the whole parish or in a part of it or for a particular group of the faithful within it, or even to help in carrying out a specific ministry in a number of parishes at the same time.

§1. Quoties ad pastoralem paroeciae curam debite adimplendam necesse aut opportunum sit, parocho adiungi possunt unus aut plures vicarii paroeciales, qui, tamquam parochi cooperatores eiusque sollicitudinis participes, communi cum parocho consilio et studio, atque sub eiusdem auctoritate operam in ministerio pastorali praestent.

§2. Vicarius paroecialis constitui potest sive ut opem ferat in universo ministerio pastorali explendo, et quidem aut pro tota paroecia aut pro determinata paroeciae parte aut pro certo paroeciae christifidelium coetu, sive etiam ut operam impendat in certum ministerium in diversis simul paroeciis persolvendum.