Discuss the evolution of the judicial interpretation of 'industry' under the Industrial Disputes Act, 1947, from the *Bangalore Water Supply* case (1978) to the 2026 Supreme Court ruling. What are its implications for worker protections?

Section 2(j) of the Industrial Disputes Act, 1947 defines "industry" in deliberately wide terms [1]. Because this single definition decides which establishments come under labour-dispute adjudication, its judicial construction has swung between expansive protection and calibrated restraint — a swing settled, for now, by the 2026 nine-judge ruling.

The expansive phase: the Triple Test (1978)

• In Bangalore Water Supply & Sewerage Board v. A. Rajappa (21 February 1978), a Constitution Bench evolved the Triple Test: systematic activity; cooperation between employer and employee; production or distribution of goods/services satisfying human wants and wishes [2].
• Absence of a profit motive was held irrelevant, and only core sovereign functions — judiciary, law and order, defence — were excluded [2].
• Effect: statutory boards, hospitals and charitable bodies were drawn in, extending dispute-resolution and retrenchment safeguards to their workers.

Doubt, reference and refinement (2005–2026)

• A five-judge Bench in State of U.P. v. Jai Bir Singh doubted the test as over-inclusive and referred it to a larger Bench [3].
• Meanwhile, Parliament codified the field through the Industrial Relations Code, 2020, subsuming the 1947 Act [4].
• On 20 August 2026, a nine-judge Bench, by 5:4, refined — not overturned — the Triple Test, applying it prospectively, with pending references under the repealed Act still governed by the 1978 law [3].

Implications for worker protections

• A narrower test may place some establishments outside tribunal machinery, weakening access to remedies against dismissal and retrenchment [4].
• Prospective application protects accrued rights in pending disputes, avoiding retrospective disruption [3].
• Until the refined test is applied case-by-case, tribunals face interpretive uncertainty; conversely, employers gain predictability.

The trajectory reflects a search for equilibrium between protective scope and workable certainty. Going forward, legislative clarification of "industry" within the Industrial Relations Code, backed by strengthened tribunal capacity, would secure both — honouring the Directive Principles' promise of just and humane conditions of work.