Ibelieve if the are underange he may be forced unless certain situations things like joint custody might come into play. joint physical custody is where a court orders a child to spend a substantial amount of time with both parents during the course of the year. second, joint legal custody is where, although one parent may have full physical custody, both parents must agree on any decisions that impact the child, such as their education, medical care and spiritual matters. lastly, both joint physical and legal custody is a combination of the first two. it is ultimately up to the court to decide whether any type of joint custody is in the best interests of a child. if not, the parent with primary custodial rights over a child will get to decide what kind of visitation for the other parent is fair and reasonable. in many situations, this works out well for both parents and they can often come to an amicable arrangement regarding visitation hours and days.