139. Jurisdiction of the High Court. (1) The High Court shall, subject to the provisions of this Constitution, have unlimited original jurisdiction in all matters and such appellate and other jurisdiction as may be conferred on it by this Constitution or other law. (2) Subject to the provisions of this Constitution and any other law, the decisions of any court lower than the High Court shall be appealable to the High Court. 140. Hearing of election cases. (1) Where any question is before the High Court for determination under article 86(1) of this Constitution, the High Court shall proceed to hear and determine the question expeditiously and may, for that purpose, suspend any other matter pending before it. (2) This article shall apply in a similar manner to the Court of Appeal and the Supreme Court when hearing and determining appeals on questions referred to in clause (1) of this article. 141. Administrative functions of the Principal Judge. (1) Subject to the provisions of article 133 of this Constitution, the Principal Judge shall— (a) be the head of the High Court, and shall, in that capacity, assist the Chief Justice in the administration of the High Court and subordinate courts; and (b) perform such other functions as may be delegated or assigned to him or her by the Chief Justice. (2) (a) (b) Where— the office of Principal Judge is vacant; or the Principal Judge is for any reason unable to perform the functions of his or her office, then, until a person has been appointed to and has assumed the functions of that office, or until the Principal Judge has resumed those functions, those functions shall be performed by a judge of the High Court designated by the President after consultation with the Chief Justice.