‘(1) Where in proceedings for or relating to a Part I order in respect of a child there is not available to the court adequate information as to where the child is, the court may order any person who it has reason to believe may have relevant information to disclose it to the court.’
‘24A Power to order disclosure of child’s whereabouts. (1) Where— (a) in proceedings for the return of a child under Part I of this Act; or (b) on an application for the recognition, registration or enforcement of a decision in respect of a child under Part II of this Act, there is not available to the court adequate information as to where the child is, the court may order any person who it has reason to believe may have relevant information to disclose it to the court.’
‘12.39 (1) Every respondent, other than a child, must file with the acknowledgment of service a notice stating – (a) the respondent's address; and (b) either – (i) the whereabouts of the child; or (ii) that the respondent is unaware of the child's whereabouts if that is the case. (2) Unless the court directs otherwise, the respondent must serve a copy of that notice on the applicant.’