The keyword here is "Joint Legal Custody" must be in print on the final divorce decree. If it is, then both parents have legal custody rights and each must have the explicit permission of the other in ALL legal matters regarding the minor child ... that is the law.
The short answer is no. Not with any North American joint custody agreement in force, unless specific allowances have been written into the court order. If you can't get permission from the other custodian, you will have to petition the court for permission.
If the niece is an adult, her aunt can take her anywhere she wants to go. If the niece is a minor and the aunt has custody, she can take her anywhere she wants, as long as conditions of the award of custody do not limit travel or relocation. If the aunt is not a custodian of a minor niece, then she can take the niece out of the country only with the permission of the custodian or custodial parent.
AUC is the value of assets held under custody by a "custodian of securities".
The Records Custodian in the military.
A motion for custody or modification to an existing custody order must be filed in the jurisdiction where the child legally resides.
If the courts grant legal custody, the custodian shouldn't have to pay child support.
What is the question?
If you are talking about custody of children, it depends on state law.
You don't with joint legal.
Typically, the caretaker is the custodian.
You need to be a good custodian. You also need to go to court whenever ordered.
If a person is designated as the custodian in the parents' will(s), then that person is likely to be granted the custody. If however, there was no will, or no custodian specified in the will, then, then the court can appoint a custodian of its own choice. Usually, any of the relatives - uncles, aunts, grand parents, step parents, and even friends and strangers can apply for the custody. It is the responsibility of the court to choose the custodian. In case there are no will, or no custodian specified, and no petitions, then the court may put the children in foster care. This answer is actually independent of the marital status of the parents, and which child is living with whom at the time of the parents' death.