Deacon Ed:
Netmil(name removed by moderator): The GIRM also specifies when the priest should genuflect and when he should fold his hands in prayer. By extension of the logic you have used the laity should never do these either. Those gestures, as well as the triple signation at the beginning of the Gospel are not reserved to the priest.
Here is an example of the laity being told to genuflect…
137. The Creed is sung or recited by the priest together with the people (cf. above, no. 68) with everyone standing. At the words
et incarnatus est (by the power of the Holy Spirit . . . became man) all make a profound bow; but on the Solemnities of the Annunciation and of the Nativity of the Lord, all genuflect.
The instruction on crossing for the Gospel…
134. At the ambo, the priest opens the book and, with hands joined, says,
Dominus vobiscum (The Lord be with you), and the people respond,
Et cum spiritu tuo (And also with you). Then he says,
Lectio sancti Evangelii (A reading from the holy gospel), making the sign of the cross with his thumb on the book and on his forehead, mouth, and breast, which everyone else does as well. The people say the acclamation
Gloria tibi, Domine (Glory to you, Lord). The priest incenses the book, if incense is used (cf. below, nos. 276-277). Then he proclaims the Gospel and at the end says the acclamation
Verbum Domini (The gospel of the Lord), to which all respond,
Laus tibi, Christe (Praise to you, Lord Jesus Christ). The priest kisses the book, saying quietly,
Per evangelica dicta (May the words of the gospel).
Here is the sign of the cross…
124. After doing these things, the priest goes to the chair. Once the Entrance chant is concluded, the priest and faithful, all standing, make the Sign of the Cross. The priest says,
In nomine Patris et Filii et Spiritus Sancti (In the name of the Father, and of the Son, and of the Holy Spirit). The people answer,
Amen.
I haven’t found the folding hands yet. Perhaps you can point me.
From here…
usccb.org/liturgy/current/chapter4.shtml#sect4
Perhaps everyone here should understand how the GIRM works. It will only say what you should do, not what you should not. If a posture is never mentioned for the laity, it is not for the laity. And also understand there are many other documents. Quoting the GIRM is one of many.