Part I
Preliminary Provisions and Enforcement of the Act
Chapter II
Enforcement of the Act
Offences committed by a Sudanese
7. A Sudanese who has committed outside the Sudan an act which makes him a principal or joint offender to an offence falling under the provisions of this Act shall be punished when he returns to the Sudan if the act constitutes an offence and also, under the law of the state where the act is done, unless it is proved that such a Sudanese was tried outside the Sudan before a competent court and has served his sentence, or has been found not guilty by such court.
Ne bis in idem
Nationality jurisdiction - national proceedings
EDIT.