(b) The person did not know that the order was unlawful; and (c) The person acted under duress or coercion. For purposes of this section, orders to commit grave child rights violations enumerated in Section 9 hereof are manifestly unlawful and shall be punished under this Act and other applicable existing laws. Section 16. Unknown Superior. - Where the crimes defined and penalized under this Act have been committed by a person pursuant to an order or command of an unknown superior, any person who in fact directed the others, spoke for them, signed receipts and other documents issued in their name, or who has performed similar acts on behalf of the armed groups, shall be deemed the superior. CHAPTER VI INVESTIGATION, PROSECUTION AND COURT Section 17. Court, Prosecutors and Investigators. - The Family Courts shall have original and exclusive jurisdiction over the crimes punishable under this Act. The Commission on Human Rights (CPIR), the Department of Justice (DOJ) and its attached agencies, the PNP or other concerned law enforcement agencies shall designate prosecutors or investigators, as the case may be, for cases involving crimes punishable under this Act. The State shall ensure that judges, prosecutors and investigators designated for purposes of this Act, receive effective training in human rights particularly on the Convention on the Rights of the Child and its Optional Protocol on the Involvement of Children Involved in Armed Conflict and related international instruments, International Humanitarian Law, International Criminal Law and National Guidelines and Protocols on the Handling and Treatment of CIAC. Section 18. Requirement and Procedures on Age Verification and Presumption of Minority. - The child involved in, affected by or displaced by armed conflict, shall enjoy the presumption of minority and shall enjoy all the rights of a child recognized in this Act and other applicable laws unless proven to be at least eighteen (18) years of age or older. The age of a child may be determined from the child‘s birth certificate, baptismal certificate or any other pertinent document. In the absence of these documents, age may be based on information from the child, testimonies of other persons, the physical appearance of the child and other relevant evidence such as dental records. In case of doubt as to the age of the child, it shall be resolved in favor of the child being deemed a minor. Any person contesting the age of the child prior to the filing of the information in any appropriate court may file a case in a summary proceeding for the determination of age before the Family Court, which shall decide the case within twenty-four (24) hours from receipt of the appropriate pleadings of all interested parties. If a case has been filed against the child and is pending in the appropriate court, the person shall file a motion to determine the age of the child in the same court where the case is pending. Pending hearing on the said motion, proceedings on the main case shall be suspended. In all proceedings, law enforcement officers, prosecutors, judges and other government officials concerned shall exert all efforts to determine the age of the child involved in armed conflict.