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The EucharistIntermediate

Should the Blessed Sacrament be reposed during Mass if exposed in a side chapel?

The Eucharist

The short answer

Exposition may continue during Mass only in a chapel completely separate from the body of the church where some of the faithful stay in adoration. Otherwise it is interrupted during Mass.

Exposition may continue during Mass only in a chapel entirely separated from the body of the church, where some of the faithful remain in adoration.

Eucharisticum Mysterium (61) says Mass may not be celebrated in the body of the church while the Blessed Sacrament is exposed, and that when exposition lasts a day or several days it should be interrupted during Mass, unless Mass is celebrated in a chapel separate from the place of exposition and at least some of the faithful remain in adoration.