✔ 最佳答案
Are you asking if it's legal for him to live where he chooses? If you are, yes it is.
However, if he is ordered to pay child support through the courts, he might have been directed to inform them and you of his changes of address any time he moves. You'd have to check with the child support people to find out.
It's not "illegal" to move and not tell the court, but it's a good idea to follow through with a change of address if that is what the court wants.