Examine the constitutional basis for the Union's power to restrict State taxation of mineral rights, in light of relevant Supreme Court jurisprudence.

Entry 50 of the State List empowers States to tax mineral rights, but expressly "subject to any limitations imposed by Parliament by law relating to mineral development." The Union's power is therefore a constitutionally conditional power to limit — not to tax — and its scope has been settled largely through judicial interpretation.

Constitutional architecture

• Entry 54, List I permits Union regulation of mines and mineral development to the extent Parliament declares it expedient in the public interest; Section 2 of the MMDR Act, 1957 makes exactly this declaration [1].
• Entry 50, List II grants States the taxing power over mineral rights, subject to Parliamentary limitation; Entry 49, List II underpins State claims over mineral-bearing lands.
• Thus the Union may curtail, not appropriate, the States' fiscal domain — the limitation must flow from a law on mineral development.

Supreme Court jurisprudence

• India Cement Ltd. v. State of Tamil Nadu (1990) treated royalty as a tax and struck down State cess on royalty, holding the field occupied by the MMDR Act.
• Mineral Area Development Authority v. Steel Authority of India (2024), a nine-judge Bench (8:1), overruled this: royalty is contractual consideration, not a tax, and States' Entry 50 competence survives unless Parliament imposes an express limitation [3]. Demands were permitted from 1 April 2005, without interest or penalty for the earlier period.

Legislative response and open questions

• The MMDR (Amendment) Bill, 2026 inserts Section 9D, barring State taxes, cess or levies on mineral rights and mineral-bearing lands except as centrally prescribed, and deeming pre-commencement unpaid levies invalid while barring refunds [1].
• Its stated aim — a uniform, predictable fiscal regime to attract critical mineral investment — extends the 2025 amendment's exploration push [2].
• Concerns persist over central regulation of mineral-bearing land, retrospective invalidation, and excessive delegation [1].

The Union's authority is thus genuine but derivative — valid only as an express, mineral-development-related limitation. Sustaining cooperative federalism requires that such limits be exercised through consultation and compensatory revenue-sharing, so that fiscal certainty for industry and the legitimate resource entitlements of mineral-rich States advance together.