As per Article 249 of the Indian Constitution, the Parliament of India can legislate on a subject in the State List if the Rajya Sabha passes a resolution stating that it is necessary in the national interest. This resolution must be approved by a majority of not less than two-thirds of the members present and voting.

Once passed, this resolution empowers Parliament to make laws on the specified subject for a period of one year, which can be extended further by passing another resolution.