Can Union Parliament frame laws on the subjects mentioned in the state list? Explain.

Yes, Union Parliament or central government can frame the laws on the subjects
mentioned in the state list in the following circumstances:
 If any subject has been referred to the central government as the subject of national
importance by Rajya Sabha through a resolution passed by 2/3 majority of members
present and voting.
 Under Article 252, if two or more states desire to frame laws by the central
government.
 In case, if emergency is imposed due to war and external or internal aggression or
President’s rule has been declared in the state.
 Also, in order to implement some international treaty or convention, etc.