As used in this article:

    (a) "Petitioner" means a person who seeks enforcement of a child-custody determination or enforcement of an order for return of a child under the Hague convention on the civil aspects of international child abduction.

    (b) "Respondent" means a person against whom a proceeding has been commenced for enforcement of a child-custody determination or enforcement of an order for the return of a child under the Hague convention on the civil aspects of international child abduction.