From the resolution of contentious issues regarding distribution of legislative powers by the courts, 'Principle of Federal Supremacy' and 'Harmonious Construction' have emerged. Explain.

How courts resolve legislative conflict

• Pith and substance looks at the true subject of a statute, so a State law is not void merely because it has some incidental Union effect.
• Colourable legislation asks whether the legislature has done indirectly what the List forbids directly.
• Occupied field and repugnancy tests apply when Union and State both legislate on a Concurrent entry.
• These tools came out of cases such as In re C.P. and Berar Motor Spirit, State of Bombay v. F.N. Balsara, and later Hoechst Pharmaceuticals and State of West Bengal v. Union of India.

Harmonious construction of entries

• Harmonious construction means reading two entries or two statutes so that both have meaning, rather than destroying one by a wide reading of the other.
• Union and State lists are construed to avoid overlap: a State tax entry is not stretched to cover a Union duty, and a Union entry is not stretched to empty a State field.
• On the Concurrent List, courts ask whether obedience to both laws is possible; if it is, there is no repugnancy and both operate.
• The method protects the federal bargain in the Seventh Schedule and matches the idea that federalism is part of the basic structure after Kesavananda Bharati and S.R. Bommai.
• Harmonious reading is the first duty; supremacy is the residual rule when harmony fails.

Principle of federal supremacy

• Article 246(1) gives Parliament exclusive power on the Union List; in a direct clash with a State law on that occupied Union field, the Union law stands.
• Article 254(1) says that if a State law on a Concurrent subject is repugnant to a Union law, the Union law prevails, and the State law is void to the extent of repugnancy.
• Article 254(2) allows a reserved State law to operate in that State if the President has assented, until Parliament legislates again — a controlled exception, not a denial of supremacy.
• Federal supremacy here is supremacy of the Constitution’s allocation, usually in favour of the Union when conflict is irreconcilable, not a political claim that States have no lists.
• Later Goods and Services Tax amendments show the same logic: once a Union-and-State scheme occupies a tax field by constitutional text, State power is read in harmony with that text, not against it.

Short way forward

• Use pith and substance and harmony first, so cooperative federalism is not killed by a mechanical Union veto.
• Keep Article 254(2) and Inter-State Council consultation for genuine Concurrent experiments.