general instruction of the roman missal liturgy documentary series i

GENERAL INSTRUCTION OF THE ROMAN MISSAL
of second and third Masses are
observed. 104
e. a priest who concelebrates with the
Bishop or his delegate at a Synod or
pastoral visitation, or concelebrates
on the occasion of a meeting of
priests, may celebrate Mass again
for the benefit of the faithful. This
holds also, with due regard for the
prescriptions of law, for groups of
religious.
205. A concelebrated Mass, whatever its
form, is arranged in accordance with the
norms commonly in force (cf. Nos. 112-
198), except for those matters that are
to be observed, even with appropriate
adaptation to circumstances, as set forth
below.
206. No one is ever to enter into a
concelebration or to be admitted as a
concelebrant once the Mass has already
begun.
207. In the sanctuary there should be
prepared:
104 Cf. Benedict XV, Apostolic Constitution Incruentum
altaris sacrificium, 10 August 1915: AAS 7 (1915),
pp. 401-404.
129