When should a Bench refer a constitutional challenge to a Constitution Bench? Discuss with reference to Article 145(3).

Article 145(3) requires that any case involving a substantial question of law as to the interpretation of the Constitution be decided by a Bench of at least five judges [1]. The provision is therefore not a matter of convenience but a jurisdictional threshold — and its trigger, not the gravity of the dispute, must decide when a smaller Bench steps aside.

The constitutional test under Article 145(3)

• The question must be substantial and one of interpretation, not merely of applying settled law to new facts [1].
• Reference is not warranted simply because a statute is novel, politically sensitive, or affects a constitutional body; novelty of legislation is not novelty of constitutional doctrine.
• The Bench may also refer an opinion under Article 143 presidential references to five judges [1].

When a reference is justified

• The constitutional provision has received no authoritative interpretation — as with Article 324(2), where appointments are "subject to any law made by Parliament", the question left open until Anoop Baranwal (2023) [2].
• Conflicting decisions of co-ordinate Benches, or a doubt cast on binding precedent, which judicial discipline forbids a smaller Bench from overruling.
• The outcome reshapes institutional design — for instance, the challenge to the CEC and Other ECs Act, 2023 (Act 49 of 2023), which replaced the CJI on the Selection Committee with a Cabinet Minister and gives the Executive a majority [2][3].

When reference should be avoided

• Where the principle is already settled and only its application survives. On 23 September 2026 the Bench hearing the 2023 Act split precisely here, one judge favouring a five-judge reference and the other a hearing on merits [4].
• Routine referral swells pendency, delaying relief in rights-based matters.

Article 145(3) balances authoritative finality against timely justice. Benches should refer when constitutional meaning is genuinely unsettled or precedent conflicts, and decide themselves where principle is clear — a discipline that keeps constitutional adjudication both reasoned and responsive.