India is federal State and has a single and unified Judicial system with three tier structure, i.e .. SC, HC and Subordinate Court. In fact, it is in the shape of a pyramid and the Supreme Court of India stands at the apex of this single integrated judicial system. The Supreme Court at present consists of the Chief Justice and 30 other Judges. But at the time of imposition of the Constitution , it had merely 8 judges..
• A person shall not be qualified for appointment as a judge of the Supreme Court unless he is a citizen of India and
• has been for a least 5 years a judge of a High Court or of two or more such Courts in succession or
• has been for at least 10 years an advocate of a High Court or of two or more such courts in succession-or
• is in the opinion of the President, a distinguished jurist. All appointee in general case can hold office till 65 years of age.