(c) Other courts or tribunals as deemed necessary to be established in accordance with the Interim Constitution of Southern Sudan and the law. The Supreme Court of Southern Sudan 173 (1) The Interim Constitution of Southern Sudan shall provide for the establishment of the Supreme Court of Southern Sudan which shall be the highest judicial institution in Southern Sudan. (2) Appeals may be submitted from Southern Sudan courts, state courts or other courts to the Supreme Court of Southern Sudan on matters brought under or relating to national, Southern Sudan and state laws as may be determined by the Interim Constitution of Southern Sudan and the law. Competences of the Supreme Court of Southern Sudan 174 The Supreme Court of Southern Sudan shall:(a) be the court of final judicial instance in respect of any litigation or prosecution under Southern Sudan or state law, including statutory and customary law, save that any decisions arising under national laws shall be subject to review and decision by the National Supreme Court, (b) have original jurisdiction to decide on disputes that arise under the Interim Constitution of Southern Sudan and the Constitutions of Southern Sudan states at the instance of individuals, juridical entities or government, (c) adjudicate on the constitutionality of laws and set aside or strike down laws or provisions of laws that contradict the Interim Constitution of Southern Sudan or the constitutions of Southern Sudan states, (d) be a court of review and cassation in respect of any criminal or civil matter arising out of or under Southern Sudan laws, (e) have criminal jurisdiction over the President and Vice President of the Government of Southern Sudan and the Speaker of Southern Sudan Legislative Assembly, (f) review death sentences imposed by Southern Sudan courts in respect of matters arising out of or under Southern Sudan laws, 67