In SR Bommai v. Union of India (1994), the Supreme Court held that ______ is part of the basic structure of the Constitution, and State governments acting against this principle can justify imposition of President's Rule under Article 356.

SR Bommai and secularism as basic structure: (a) Context: Challenge to President's Rule imposition in States (Karnataka, Meghalaya, Nagaland) based on Governor's reports alleging anti-secular activities, (b) Supreme Court holding: (i) Secularism part of basic structure; State government acting against secularism can justify Article 356, (ii) Floor test primary method to test majority; Governor cannot dismiss Ministry without testing majority on Assembly floor, (iii) Presidential satisfaction subject to judicial review; courts can examine if based on objective material, (c) Applications: (i) Secularism test: State policies promoting religious discrimination can trigger Article 356, (ii) Judicial review: Courts can revive State Assembly if proclamation invalidated, (iii) Federal balance: Protects State autonomy against political misuse of Article 356, (d) Rationale: (i) Secularism essential to constitutional identity (Preamble, Articles 25-28), (ii) State action against secularism undermines constitutional machinery, (iii) Union duty to preserve constitutional order, (e) Illustrates basic structure application: Secularism as unamendable core feature; judicial review ensures Article 356 used for genuine constitutional breakdown, not political ends.