Yes, joint decision-making authority is possible in cases where there is a lot of conflict between the parents that it impairs their ability to cooperate with one another. Whether such an arrangement would be determined on a case by case basis. Further, such an arrangement may work for some parents despite the conflict, whereas it might not work for other parents simply because of communication skills or personality that a parent has.
Michelle R. Mosby-Scott is a lead family law attorney at Allison & Mosby-Scott in Bloomington Illinois. She focuses solely on family law, regularly representing clients in divorce, child custody and support, pension division and removal, and alimony. www.allisonmosby-scott.com