Disputes — International Court of Justice — Contentious jurisdiction — Competence — Appeal from decisions of Council of International Civil Aviation Organization — Chicago International Civil Aviation Convention and International Air Services Transit Agreement (1944) — Suspension by India of flight of Pakistan civil aircraft over Indian territory — “Application” and “Complaint” to ICAO Council by Pakistan alleging breach of Convention and Transit Agreement — Decisions of Council assuming jurisdiction — Chicago Convention, Article 84 — Transit Agreement, Article II — Competence of Court to entertain appeal as to Council decisions assuming jurisdiction — Jurisdiction of Council in respect of disagreement — Whether involving “disagreement … relating to the interpretation or application” of Chicago Convention or Transit Agreement — Alleged irregularities in procedure of Council