Statement 1 is correct: Parliament can legislate on State List subjects under certain exceptional circumstances, such as when the Rajya Sabha passes a resolution declaring that it is necessary or expedient in the national interest (Article 249), during a Proclamation of Emergency (Article 250), when two or more states request Parliament to legislate on a State subject for them (Article 252), or for implementing international treaties (Article 253). Statement 2 is incorrect: As explained above, Parliament can legislate on State List subjects under specific circumstances. Statement 3 is correct: Article 249 allows Parliament to legislate on a State List subject if the Rajya Sabha passes a resolution supported by not less than two-thirds of the members present and voting, declaring it necessary or expedient in the national interest for Parliament to do so.