Parliament legislating on a State List subject: Under what condition may Parliament legislate on a matter in the State List? Consider the Article 249 mechanism via the Council of States (Rajya Sabha). Choose the correct enabling condition.

What is being asked? The constitutionally valid route for Parliament to legislate on State List subjects.

Concept/Approach
Article 249 empowers Parliament to legislate on matters in the State List if the Rajya Sabha declares by a resolution, supported by not less than two-thirds of the members present and voting, that it is necessary in the national interest.

Step-by-step reasoning
• Identify the correct Article → 249.• Required majority → 2/3 of members present and voting in the Rajya Sabha.• Purpose → national interest.

Common pitfalls
Assuming a presidential order or a Supreme Court authorization can substitute the Rajya Sabha resolution (they cannot, in this context).

Final Answer
If the Rajya Sabha passes a resolution by two-thirds in the national interest