Op, if you are going for a hearing now, has there already been mediation and 'detrimental showing' ?
"The California Supreme Court holds that a parent who has sole legal and physical custody does not have the absolute right to move away, but the noncustodial parent is entitled to an evidentiary hearing only after unsuccessful mediation and showing of the move's detrimental effect on the child."
In re Marriage of Brown and Yana (2006) (No. S131030; California Supreme Court, February 2, 2006) case posted by OG.