Combined use of land reserved for public purpose upheld where primary sanctioned use remains substantially intact and regulation needs true change of user.

Constructive res judicata under Section 11 CPC did not bar the second writ petition because the earlier public interest litigation had been found not bona fide, so Explanation VI did not bind the present respondents. The challenge to the land development arrangement also failed: the plot continued substantially as a bus depot, the ancillary commercial use was held within statutory powers, and the public tender process negatived allegations of secrecy, undervalue, or mala fides. Building Regulation No. 3 was read as requiring prior modification only for a true change of user, not for a combined use that left the primary sanctioned purpose intact. The development arrangement was therefore upheld.

---

---

Issues: (i) whether the second writ petition was barred by res judicata in view of the earlier public interest litigation, (ii) whether the development of the plot with a commercial component amounted to an impermissible diversion from the sanctioned public purpose and disclosed mala fides or undervalue, and (iii) whether Building Regulation No. 3 prohibited the proposed combined use of the plot without prior modification of the development plan.

Issue (i): whether the second writ petition was barred by res judicata in view of the earlier public interest litigation

Analysis: Explanation IV to Section 11 of the Code of Civil Procedure, 1908 embodies constructive res judicata and extends finality to matters that might and ought to have been raised earlier. Explanation VI applies where persons litigate bona fide in respect of a public right, so that persons interested in that right are bound by the decision. The earlier writ petition had been found by the High Court not to be bona fide public interest litigation, having been instituted at the instance of a builder. That finding excluded the application of Section 11 against the respondents in the present proceeding. The omission to challenge the later plea in the earlier petition did not, by itself, defeat the present case.

Conclusion: The second writ petition was not barred by res judicata, but only because the earlier litigation was held not to be bona fide public interest litigation.

Issue (ii): whether the development of the plot with a commercial component amounted to an impermissible diversion from the sanctioned public purpose and disclosed mala fides or undervalue

Analysis: The Court accepted that the land had been acquired for a bus depot, but held that the proposed construction substantially preserved that purpose while allowing a commercial component on part of the plot. The tender process was public, widely advertised, and competitive, so the allegation of secrecy or gross inadequacy of consideration was rejected. The surrounding facts showed no specific proof of personal or collateral malice on the part of the officers, and the transaction was also within the Corporation's statutory powers to hold property and promote public convenience and city improvement. The earning of premium and rent for public use did not convert the transaction into an ultra vires exercise.

Conclusion: The challenge based on undervalue, secrecy, mala fides, and diversion from purpose failed.

Issue (iii): whether Building Regulation No. 3 prohibited the proposed combined use of the plot without prior modification of the development plan

Analysis: Regulation 3 fixed the user of Final Plot No. 14 as BEST Bus Depot, subject to change by the Local Authority after modification of the Development Plan. The Court held that the word "change" in the proviso denoted a substantial or complete alteration of user, not a permitted combined use that left the primary bus depot purpose intact. Since the plot continued to be used substantially for the original public purpose, with commercial use only ancillary to augment Corporation revenue, the proviso was held inapplicable. The Court also noted that later documents and the planning context supported the view that the arrangement was a minor adjustment rather than a true change of user.

Conclusion: Building Regulation No. 3 did not bar the proposed combined user of the plot.

Final Conclusion: The impugned judgment of the High Court could not stand, as the decisive ground on building regulation was rejected and the other objections were also overruled, leaving the development arrangement legally valid.

Ratio Decidendi: A combined use of land reserved for a public purpose is permissible where the primary sanctioned use remains substantially intact, the ancillary commercial use is within statutory powers, and the governing regulation requires a true change of user before prior modification of the development plan becomes necessary.

---