5 Constitutional Bench and Its Role (Article 137)

1. Composition:the CJ + four justices (appointed by the CJ on the Judicial Council's recommendation);2. The exclusive docket: (i) the Article-133(1) voidness petitions; (ii) jurisdiction disputes — federation-v-province, province-v-province, province-v-local, local-v-local (federalism's umpire); (iii) federal/provincial election disputes and member-ineligibility determinations (with Article 90's and 181's disqualification references); (iv) the CJ's allocated seriousconstitutional questions (137(3));3. Procedure: by the Supreme Court's own rules (137(4));4. The design's logic: a stabilized five-judge chamber for constitutional cases — the "constitutional court within the Supreme Court" model (the German/Italian comparative family — not a separate court but a special bench); the 2015 debate over a separate Constitutional Court remembered in the design's compromise.