advisory opinions

An advisory opinion is a formal statement of law delivered by a court or international tribunal in response to a referred legal question, distinguished from a contentious judgment by its non-binding character and the absence of opposing litigant parties. In Indian constitutional law, the mechanism is grounded in Article 143 of the Constitution, which empowers the President to refer to the Supreme Court any question of law or fact of public importance that has arisen or is likely to arise. Article 143(1) leaves the Court discretion to decline a reference, whereas Article 143(2)—concerning pre-Constitution treaties and agreements under the proviso to Article 131—obliges the Court to report its opinion. At the international level, Article 96 of the UN Charter read with Article 65 of the Statute of the International Court of Justice authorises the General Assembly, the Security Council, and duly authorised UN organs and specialised agencies to request advisory opinions from the ICJ.

The defining feature of an advisory opinion is that it does not constitute res judicata and binds no party. Under Article 143, the opinion is technically a "report" to the President and is not a binding judicial decision, though in practice it carries enormous persuasive and quasi-precedential weight and is treated as declaring the law. The Supreme Court may decline a reference, as it did in the Ayodhya / Ram Janmabhoomi Reference (1994), where it returned the President's question as unnecessary and opposed to secularism. The Court has also clarified, in In re Special Reference No. 1 of 2002 (Gujarat Assembly Election case), that it cannot use Article 143 to reconsider or overrule its own binding pronouncements such as those in contentious appeals. ICJ advisory opinions, similarly, lack binding force but command authority as statements of international law.

Landmark Indian references illustrate the instrument's reach: the Delhi Laws Act Reference (1951) on delegated legislation, the Kerala Education Bill Reference (1958) on minority rights under Article 30, the Berubari Union Reference (1960) holding that cession of territory requires a constitutional amendment under Article 368, the Presidential Poll Reference (1974), the Third Judges Case (1998) which refined the collegium system, and the 2G Spectrum / Natural Resources Allocation Reference (2012). Internationally, the ICJ's opinions on the Legality of the Threat or Use of Nuclear Weapons (1996), the Construction of a Wall in the Occupied Palestinian Territory (2004), the Kosovo Declaration of Independence (2010) and the Chagos Archipelago (2019) remain heavily cited. As of 2026 the Article 143 mechanism and the ICJ's advisory jurisdiction both remain fully operative.

For the examination, advisory opinions are tested in Polity (Indian Constitution, Supreme Court jurisdiction) and in International Law papers across UPSC, FSOT, CSS and BCS. Typical UPSC angles ask candidates to distinguish original, appellate and advisory jurisdiction, to identify that Article 143(1) opinions are discretionary and non-binding while 143(2) references must be answered, and to pair landmark references with the doctrines they settled. International-law papers probe the difference between contentious and advisory ICJ jurisdiction and the Charter/Statute provisions that confer it.