You can ask the court to revise custody order if a significant change of circumstances is evident and this change could have negative impact on the child. Problems in visitation, behavioral changes, relocation and its effect on the child-parent relationship, employment, residence or marital changes to name a few of the significant changes that could adversely affect a child.
Since there is abrupt changes occur in our society, it is imperative that parents should make annual parenting plan evaluations. Factors such as child-parent or parent-parent relationships, children's wishes could change drastically after divorce. The court is disinclined to make alterations to parenting custody plan but will do so if the need arises and the child's best interest is at stake.
Ex-spouses could introduce changes to the last court order by accepting any amendments they made between themselves. If the changes in the last custody order are more pronounced, it is for the best to put major alterations in writing since it is hard to enforce oral agreements.