Although they vary to some extent, you generally can't move with your kids across a state line without the express written consent of the other parent or a court order. (info.legalzoom.com)
Ideally, you and your child will be travelling with either the written consent of the other parent, or with proof of court - ordered entitlement. (familyllb.com)
Therefore, a parent should not take their child from the home without consent of the other parent or a court order authorizing them to do so. (slsedmonton.com)