(c) (d) (e) a court or has practised as an advocate for a period not less than fifteen years before a court having unlimited jurisdiction in civil and criminal matters; a justice of the Supreme Court if he or she has served as a justice of Appeal or a judge of the High Court or a court of similar jurisdiction to such a court or has practised as an advocate for a period not less than fifteen years before a court having unlimited jurisdiction in civil and criminal matters; a justice of Appeal, if he or she has served as a judge of the High Court or a court having similar or higher jurisdiction or has practised as an advocate for a period not less than ten years before a court having unlimited jurisdiction in civil and criminal matters or is a distinguished jurist and an advocate of not less than ten years’ standing; a judge of the High Court, if he or she is or has been a judge of a court having unlimited jurisdiction in civil and criminal matters or a court having jurisdiction in appeals from any such court or has practised as an advocate for a period not less than ten years before a court having unlimited jurisdiction in civil and criminal matters. (2) Any period during which a person has practised as a public officer holding an office for which qualification as an advocate is required shall be counted in the calculation of any period of practice required under clause (1) of this article even though that person does not have a practising certificate. 144. Tenure of office of judicial officers. (1) A judicial officer may retire at any time after attaining the age of sixty years, and shall vacate his or her office— (a) in the case of the Chief Justice, the Deputy Chief Justice, a justice of the Supreme Court and a justice of Appeal, on attaining the age of seventy years; and (b) in the case of the Principal Judge and a judge of the High Court, on attaining the age of sixty-five years; or (c) in each case, subject to article 128(7) this Constitution, on attaining such other age as may be prescribed by Parliament by law; but a judicial officer may continue in office after attaining the age at which he or she is required by this clause to vacate office, for a period not exceeding three months necessary to enable him or her to complete any work pending