Sales return requires the same goods in substance; altered goods after manufacture are treated as a purchase, not a return.

Delay in filing the State's appeal was condoned because the order had not been communicated and the Tribunal's discretion showed no perversity. The appeal was also treated as competent: the Commissioner was not a necessary party, and the filing was supported by a Government decision, authorisation by the Principal Secretary, and the Rules of Business under Articles 154 and 166. On the tax character of the kerosene transaction, the first leg was treated as a sale, and the return stream was held not to be a sales return because the goods had changed in substance, character and commercial utility after manufacture. Prospective effect was considered appropriate because of the litigation history and natural justice concerns.

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Issues: (i) Whether the delay in filing the State's appeal before the Sales Tax Tribunal was rightly condoned; (ii) whether the appeal was incompetent for want of authority of the officer who filed it and for non-joinder of the Commissioner; (iii) whether the supply of kerosene by BPCL to RIL was a sale or a contract of bailment and whether the return stream constituted a sales return or a purchase; (iv) whether the Tribunal ought to have granted prospective effect to its order.

Issue (i): Whether the delay in filing the State's appeal before the Sales Tax Tribunal was rightly condoned.

Analysis: The order appealed from had not been communicated to the State and the facts disclosed a peculiar situation. Condonation of delay depends on the facts of each case, and the Tribunal exercised discretionary jurisdiction on a recorded basis. No perversity or patent illegality was shown.

Conclusion: The delay was rightly condoned, in favour of the Revenue.

Issue (ii): Whether the appeal was incompetent for want of authority of the officer who filed it and for non-joinder of the Commissioner.

Analysis: The Commissioner acted in a quasi-judicial capacity and was not a necessary or proper party to the appeal. The record showed that the Government had taken a decision to appeal, the Principal Secretary of the Finance Department authorised the officer on special duty, and the Rules of Business supported the manner in which the appeal was filed. Article 154 and Article 166 of the Constitution of India were applied to sustain the filing.

Conclusion: The appeal was competent, in favour of the Revenue.

Issue (iii): Whether the supply of kerosene by BPCL to RIL was a sale or a contract of bailment and whether the return stream constituted a sales return or a purchase.

Analysis: The earlier proceedings had attained finality on the nature of the first leg as a sale, and that issue could not be reopened. On the return stream, the statutory concept of sales return required the same goods to be returned in the same form and with the same character and use. The kerosene supplied to RIL was rich in N-paraffin and fit for extraction, while the returned stream was denuded after extraction and had a different commercial character and utility. Mere conformity to kerosene standards did not make the two products identical. The process undertaken by RIL amounted to manufacture within the statutory definition.

Conclusion: The first leg was a sale, and the return stream was not a sales return but a purchase by BPCL, in favour of the Revenue.

Issue (iv): Whether the Tribunal ought to have granted prospective effect to its order.

Analysis: The long course of litigation, the earlier assessments, and the earlier determination in favour of the assessee supported prospective operation. The issue was also brushed aside without a proper hearing before the Tribunal, offending natural justice. The Court therefore exercised the discretion that should have been exercised below.

Conclusion: Prospective effect ought to have been granted, in favour of RIL and BPCL.

Final Conclusion: The challenge to the Tribunal's view on delay, maintainability, and the tax character of the return stream failed, but relief was granted on the limited question of prospective operation, so the writ petitions were partly allowed.

Ratio Decidendi: For a transaction to qualify as a sales return, the returned goods must be the same goods in substance, character, and commercial utility as those originally sold; where the goods are altered by a process amounting to manufacture and their use changes, the return is a purchase and not a sales return.

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