As of June 30, the father's last name will no longer have priority at the time of putting the order of the surnames to the newborn children and it will be the two parents who must agree to choose whether the first surname of the child will be that of the mother or that of the father. This is good news for women since this way the maternal surname can prevail for more generations.
But at the same time, it can be a problem for many couples who do not agree, because both may want to put their last name first before that of the couple, which can create conflicts within the couple. But it is the most equitable way of being able to name the children since before it was the father's by default, leaving the mother's surname aside, which in several generations disappeared.
If the parents do not agree within three days after the birth of the child, then it will be a civil registry official who will make the decision neutrally. The order of surnames from now on may be the mother's first and the father's. In principle it is expected that the parents agree quickly on this and that the work in the Civil Registry does not delay, but it will be necessary to wait from that date to know if the parents agree or if it is a reason for discussion.
Since 2000, the newborn child could be registered with the mother's last name first, but the parents had to make a request to the Civil Registry judge together with a declaration of mutual agreement on this. The change affected all the children of the couple and if there was no consensus, the paternal surname always prevailed. Now this is not the case and parents must agree by obligation so that it is something equal for both men and women.