3. The Democratic Republic of East Timor shall not recognise any acts or contracts concerning the natural resources referred to in item 1 of Section 139 entered into or undertaken prior to the entry into force of the Constitution which are not confirmed by the competent bodies after the Constitution enters into force. Section 159 (Working Languages) Indonesian and English shall be working languages within civil service side by side with official languages as long as deemed necessary. Section 160 (Serious Crimes) Acts committed between the 25th of April 1974 and the 31st of December 1999 that can be considered crimes against humanity of genocide or of war shall be liable to criminal proceedings with the national or international courts. Section 161 (Illegal appropriation of assets ) Illegal appropriation of mobile and fixed assets that took place before the entry into force of the present Constitution is considered crime and shall be resolved as provided for in the Constitution and the law. Section 162 (Reconciliation) 1. It is incumbent upon the Commission for Reception, Truth and Reconciliation to discharge functions conferred to it by UNTAET Regulation No. 2001/10. 2. The competencies, mandate and objectives of the Commission shall be redefined by the Parliament whenever necessary. Section 163 (Transitional judicial organization) 1. The collective judicial instance existing in East Timor, composed of national and international judges with competencies to judge serious crimes committed between the 1st of January and the 25th of October 1999, shall remain operational for the time deemed strictly necessary to conclude the cases under investigation. 2. The judicial Organization existing in East Timor on the day the present Constitution enters into force shall remain operational until such a time as the new judicial system is established and starts its functions.