Thanks for your question.Yes you either need permission from the ex or permission from the court here regardless of custody.
Where the relocation distance is great, the case becomes more complex. The primary factor of best interest of the child continues to be considered along with facts such as (1) the existing custody and visitation arrangement, (2) the attachment and support of the non-custodial parent and other relatives, (3) the child's ties to the community, school, church or synagogue, and friends, and (4) the child's desires and wishes. Only a small minority of states require a custodial parent to get the written consent of the non-custodial parent or a court order based upon a finding of the court that it is in the best interest of the child to allow the move. In many states, a custodial parent can relocate if there is a valid reason for the relocation and the move does not result in harm to the child.
The ability of the child to have continuing and frequent contact with both parents, without a detrimental effect due to the relocation, is the primary consideration for a court in modifying an existing order to allow the relocation. The modified order of the court could provide additional time with the non-custodial parent during summer and other school recesses and the obligation of the custodial parent to pay the additional transportation
expenses incurred in facilitating the visitation exchange. In California, the impact of a planned long-distance move on a noncustodial parent’s relationship with his children may be considered before the children can be moved out of the state. If the move away will detrimentally harm the relationship between a child and a parent, together with other factors, it may be sufficient to justify a change in custody to the other parent.
Custodial parents who move away with the child without providing notice to the other parent may not only face a change in custody to the other parent but also criminal charges of kidnapping
. Before any move is entertained, the non-custodial parent should be informed of the impending move and an effort made to reach a mutually acceptable parenting plan based upon the proposed location of both parents.
You would motion th e court here for such permission to relocate.If the other parent has no contact you may well be granted such permission here.