OIL & NATURAL GAS CORPORATION LTD. vs ATWOOD OCEANIC INTERNATIONAL, S.A. — C.A. No. 1218/2001

Case Summary: ONGC Ltd. v. Atwood Oceanic International, S.A. Court Decision: The Supreme Court dismissed ONGC's appeals, upholding the Bombay High Court's Division Bench judgment that partially allowed ONGC's challenge. The Court held that Atwood was entitled to reimbursement for increased employee income tax costs for assessment year 1984-85 only, but not for 1983-84 (where the tax notification had no retrospective effect). The dispute centered on whether a 1983 Government notification extending income tax to offshore work areas constituted a "change in law" requiring cost reimbursement under the contract's Clause 7. This case analysis is maintained by casestatus.in based on publicly available court records.