A child custody order can be changed if there has been a material change in circumstances since the last order was entered and a modification would be in the best interests of the child. Importantly, neither parent may simply decide not to follow the existing order. The parents must either consent to a modification or a judge can determine whether one is appropriate. If both parents agree upon the changes, they must still submit their agreement to the court to be signed by the judge if they want it to become a binding order.