Ecclesia de Eucharistia §33

³³ When, due to the scarcity of priests, non-ordained members of the faithful are entrusted with a share in the pastoral care of a parish, they should bear in mind that – as the Second Vatican Council teaches – “no Christian community can be built up unless it has its basis and centre in the celebration of the most Holy Eucharist”. They have a responsibility, therefore, to keep alive in the community a genuine “hunger” for the Eucharist, so that no opportunity for the celebration of Mass will ever be missed, also taking advantage of the occasional presence of a priest who is not impeded by Church law from celebrating Mass.