The Supreme Court ruled that an Assessing Officer cannot reopen an income-tax assessment that has already been settled by the Income Tax Settlement Commission under Section 245D of the Income Tax Act, 1961. Once the Commission passes a final settlement order, it becomes conclusive and binding. The AO's power under Section 147 to reopen assessments does not extend to matters that the Commission has already adjudicated, as doing so would nullify the settlement mechanism entirely.

This ruling clarifies a jurisdictional boundary within India's income tax architecture. The Income Tax Settlement Commission (ITSC) was a quasi-judicial body created under Chapter XIX-A of the Income Tax Act, 1961, designed to allow taxpayers to disclose undisclosed income and obtain a final, binding settlement. Section 245D governs the Commission's procedure, and Section 245I declares its orders conclusive — meaning they cannot be reopened or revised by any income tax authority, including the Assessing Officer.

Section 147 empowers an AO to reopen assessments if income has escaped taxation. The conflict arises when an AO tries to use Section 147 against an assessee whose case the ITSC has already settled. The Supreme Court's ruling draws a clear line: Section 245I's conclusiveness overrides Section 147's reopening power. The legislative intent behind the Settlement Commission was finality — giving taxpayers certainty in exchange for voluntary disclosure. Allowing AOs to reopen settled matters would defeat that purpose entirely.

This is a classic principle of special law overriding general law (generalia specialibus non derogant). Chapter XIX-A is the special regime; Section 147 is the general assessment power. The special regime prevails. CLAT PG examiners frequently test this kind of statutory conflict and the principle used to resolve it, making this ruling an important application-layer topic.