STAND: After priest enters sanctuary.
KNEEL: Prayers at the foot of the altar.
SIT: Epistle, Gradual, Alleluia/Tract.
STAND: Gospel.
SIT: Announcements and sermon.
STAND: Credo; genuflect at Et incarnatus est....
SIT: After the Oremus before the Offertory antiphon.
KNEEL: Sanctus (bell is rung thrice).
SIT: After Communion when priest has completed purification with wine and water.
KNEEL: Last Blessing; make the Sign of the Cross as the priest blesses.
STAND: Last Gospel; genuflect at Et verbum caro factum est....
KNEEL: Leonine prayers after Mass.
STAND: Until priest leaves sanctuary.
RUBRICS FOR THE CONGREGATION
AT A MISSA CANTATA OR HIGH MASS
KNEEL: At the Asperges; at the sprinkling itself stand, bow, and make the Sign of the Cross; sit while priest changes vestments.
KNEEL: Prayers at the foot of the altar.
SIT: When priest sits at the Gloria; stand when he does and for the Collect prayers following.
SIT: Epistle, Gradual, Alleluia/Tract.
STAND: When priest chants Dominus Vobiscum before the Gospel.
SIT: Announcements and sermon.
STAND: Credo; sit when the priest does, kneel at Et incarnatus est..., stand when priest rises.
SIT: After the Oremus before the Offertory antiphon; stand momentarily during the incensation of the people at High Mass.
STAND: When priest chants Per omnia saecula saeculorum before Preface.
KNEEL: Sanctus (bell is rung thrice).
STAND: When priest chants Per omnia saecula saeculorum before Pater Noster.
KNEEL: Agnus Dei.
STAND: When priest chants Dominus Vobiscum before the Postcommunion prayer.
KNEEL: Last Blessing; make the Sign of the Cross as the priest blesses.
STAND: Last Gospel; genuflect at Et verbum caro factum est....