Under what condition can legal and/or physical custody be shared in a joint-custody arrangement?

In joint custody arrangements, legal and/or physical custody can be effectively shared when the parents demonstrate a willingness and ability to cooperate. This cooperation is essential for the successful implementation of a joint custody plan, as it requires ongoing communication, coordination, and collaboration between parents regarding the child’s upbringing and daily care.

The reasoning behind the emphasis on cooperation is rooted in the understanding that joint custody is intended to serve the best interests of the child. If both parents can work together harmoniously, they can create a supportive environment that fosters the child’s well-being. Courts look for evidence of this willingness and ability during custody hearings, as it indicates that the parents can make collective decisions and support each other’s involvement in the child’s life.

The other options do not adequately address the requirements for effective joint custody. For instance, the notion that joint custody is a default outcome doesn’t consider the specific dynamics of each family situation and the need for cooperation. Similarly, while the child's age may influence custody decisions, it does not inherently dictate that joint custody should occur. A 50-50 time-sharing agreement, while one form of joint custody, is not mandatory for joint custody arrangements and doesn't ensure cooperation between parents.