In Re: The Punjab Termination of Agreement Act, 2004 (Special Reference No. 1 of 2004, under Article 143(1) of the Constitution of India)
Background
Punjab, Haryana and Rajasthan had agreed in 1981 to share the waters of the Ravi and Beas rivers, with Haryana's share to flow through the still-unfinished Sutlej-Yamuna Link (SYL) Canal. After construction stalled for decades and the Supreme Court twice ordered Punjab to complete or hand over the canal works (in 2002 and 2004), Punjab's legislature instead enacted the Punjab Termination of Agreement Act, 2004, purporting to unilaterally terminate the 1981 water-sharing agreement and all related obligations, including the Court's own decrees. The President of India referred four questions about the validity of this Act to the Supreme Court for its advisory opinion under Article 143(1).
Decision Breakdown
The Constitution Bench held that once a dispute between States has been finally adjudicated by the Supreme Court, a State cannot use its ordinary legislative power to unilaterally nullify that judicial decree, doing so violates the separation of powers and the rule of law, because it effectively makes a State "a judge in its own cause." Relying on its own precedent in the Mullaperiyar/Cauvery line of cases, the Court held the Punjab Act, 2004 was not validly enacted and could not discharge Punjab from its obligations under the 1981 agreement or the Court's 2002 and 2004 decrees. All four referred questions were accordingly answered against the validity of the Punjab Act. Justice Shiva Kirti Singh added a short separate opinion agreeing with the result but further emphasising that delay in executing a final Supreme Court decree undermines public faith in the justice system.
Lesson Learnt
A State legislature cannot pass a law to erase or escape the binding effect of a final Supreme Court judgment against it, once courts have conclusively decided an inter-State dispute, only the courts (not one party's own legislature) can alter that outcome; this is what keeps the rule of law and separation of powers meaningful in India's federal structure.