the term “missing child” means any individual less than 18 years of age whose whereabouts are unknown to such individual’s parent;

the term “Administrator” means the Administrator of the Office of Juvenile Justice and Delinquency Prevention;

the term “Center” means the National Center for Missing and Exploited Children;

the term “parent” includes a legal guardian or other individual who may lawfully exercise parental rights with respect to the child; and

the term “child sexual abuse material” has the meaning given the term “child pornography” in section 2256 of title 18; 1