Virginia law has no provision for a child to make a decision about which parent to live and visit with at any age.
Once custody has been determined by a court it would take another court order to change that arrangement. The court may listen to a child's request to change custody but it is under no obligation to modify the custody order at the child's request. The court would be looking for an appropriate reason to order a change in custody such as the custodial parent being unfit and the change being in the best interest of the child.
A child is free to decide which parent to live with in every state once they have reached eighteen years of age.
see related question
18.
Yes, as long as the child is a minor they can not choose where to live.
When the child is 18.
Generally, custody orders end at age eighteen and the child can choose where she wants to live.
If you are of legal age and there is not court order of custody or visitation then you may move with your child wherever you so choose.
Usually age 18 and in some states age 21, 23. Check your state law as to when a minor becomes an adult.
If this relates to custody, age 18. see links
I believe that the minimum age is 12.
There is no minimum age.
see links below
The guidelines are basically the same in every state but obviously there are a few minor differences. Joint custody consists of Primary Custody & Secondary Custody. The parent with primary custody is who the child lives with & the other parent has secondary custody. Depending on the age of the child & the state in which they reside, the court may let them determine where they choose to live. Or if both parents agree on the child's decision then the child can live with either parent.