Is it a condition that the two witnesses hear the woman's authorization of who will be her agent and guardian in the marriage contract?

It is not a condition to have witnesses when a woman designates her guardian to arrange her marriage, and this is the more cautious approach. Similarly, it is not a condition to have witnesses when a guardian designates someone else to arrange the marriage of the woman under his guardianship, according to the sounder opinion. However, if a woman designates someone other than her guardian to arrange her marriage, this is not valid, based on the preferred view, because the validity of her designation is contingent upon the validity of her conducting the marriage contract herself.