Orans posture

In Paul Turner's Blog by Paul Turner

Q:  Much appreciation for all your edifying explanations and clarifications on liturgical matters.
One issue that I still see being practised at Mass is the Orans posture at Our Father. I understand it is only for the priests as they are offering on our behalf our prayers to God the Father. However, I see some members of the congregation if not many of them adopting the same gesture. I am wondering whether Rome has issued a directive on the proper posture or is it left to the local ordinary to decide or the regional bishops conference?
A:  There is no explicit instruction on this. I’ve treated the situation in my book, Let Us Pray: A Guide to the Rubrics of Sunday Mass. The liturgical books are silent about what the laity do with their hands during the Lord’s Prayer.