Without prejudice to the agreements and conventions to which the State is a party, the provisions of this Law shall not apply to the offence committed onboard foreign ships and airplanes in or passing through the territory of the State unless the offence is against national security, or the defendant or plaintiff is of Qatari nationality, or if assistance is requested by the captain or the pilot, from the Qatari authorities. Article 16 The provisions of the present Law shall apply to: 1. Whoever commits outside the State of Qatar an act which renders him a perpetrator or an accomplice in a criminal offence that has occurred entirely or partially inside the State. 2. Whoever commits inside the State an offence that makes him a perpetrator or an accomplice in a criminal offence that has occurred entirely or partially outside the State and it is punishable by virtue of the present Law and the law of the country in which it was committed. 3. Whoever commits outside the State or participates in an offence against the internal or external national security, or commits forgery and counterfeit of official documents, government seals, marks, or stamps, or the forgery and counterfeiting of any currency note or coins in the State, or possessing or distributing these counterfeited currencies. Article 17 The provisions of this Law shall apply to any person who resides in the State of Qatar after committing abroad, as perpetrator or accomplice, any of the criminal offences of trafficking in drugs or humans or acts of piracy or international terrorism. Article 18 Every citizen, whilst abroad, who commits an act that is considered a felony or a misdemeanor according to the provisions of this Law, shall be punished in pursuance of the provisions thereof, upon return to the State of Qatar, even though the act is punishable under the law of the country in which the offence was committed. Article 19 “Non bis in idem”:  No criminal proceedings may commence against any person who has already been acquitted by foreign law courts on a criminal charge or has been finally convicted and punished or if the offence has been barred by time. Whoever, being a citizen or a permanent resident of Qatar, commits an act or omission outside Qatar that if committed in Qatar would constitute an offence under the law in force in Qatar, shall be deemed to have committed that act or omission in Qatar even if that person is acquitted of any offence stipulated under Sub-article 16-3 herein. Article 20 The provisions stipulated in the Law of Juveniles shall be applicable for juveniles who have reached seven years and under sixteen years of age. The death sentence may not be imposed on a juvenile who is under eighteen years of age at the time of committing the offence. Part 3 The Crime