Hello anrmenchaca47,
Generally, when the GIRM is silent it means it is left up to the Bishops to decide within their own dioceses. I know that many Bishops in the south have issued directives on this for their individual dioceses. I know one of the sticking points is actually the raising of the hands after the Our Father. Raised outstretched hands (even when joined with other people’s hands) is an action called the ‘orans’ posture and is solely and explicitly reserved for the priest when done within the context of the mass. Some bishops outlaw holding of hands because it almost inevitably leads to the laity assuming the ‘orans’ and others just prohibit the laity’s ‘orans’ itself. The ‘orans’ isn’t just a posture but has a long biblical significance going all the way back to Moses lifting up the prayers of the Israelites and beyond. When Christ assumed the ‘orans’ when teaching the Lord’s Prayer, he was assuming the role of the High Priest as he was lifting up, not only his own prayers, but the prayers of those with him. It would have been anathema for the average Jews of the day to pray like that for others. It only passed on to the Bishops and priests through the participation in Christ’s priesthood.
God Bless,
Br. Ben, CRM