In its modern composition, the Supreme Court is incorporated of Chief Justice of Pakistan, sixteen justices and two "ad hoc" who are confirmed to their appointment by the President upon their nominations from the Prime Minister's selection based on their merited qualifications. Once appointed, justices are expected to completed a designated term and then retire at 65 years old, unless their term is terminated through resignation or impeachment by the Supreme Judicial Council resulted in a presidential reference in regards to the misconduct of judge(s). In their discourse judgement, the justices are often categorized as having the conservative, textual, moderate, and liberal philosophies of law in their judicial interpretation of law and judgements.