V
Vico
Guest
Both parts of the canon pertains to celebrants. Note that the condition is “grave reason” with “no opportunity to confess” not with opportunity to confess.…
Canon 916 pertains to the celebrant of Mass in the first part, and the communicant in the second part. The OP is asking about the second part as it pertains to the laity.
Can. 916 Anyone who is conscious of grave sin may not celebrate Mass or receive the Body of the Lord without previously having been to sacramental confession, unless there is a grave reason and there is no opportunity to confess; in this case the person is to remember the obligation to make an act of perfect contrition, which includes the resolve to go to confession as soon as possible.