The Indian Parliament has the authority to enact laws applicable throughout the country (or any specific region) to fulfil its obligations under international treaties. This power is enshrined in Article 253 of the Indian Constitution.

Unlike some situations where the Parliament might require state consent for legislative actions, Article 253 grants the authority to enact these laws without needing approval from individual states.

Also, the Constitution empowers Parliament to make laws on any matter in the state list under five extraordinary circumstances

• Rajya Sabha passes the resolution(Article 249)
• National emergency(Article 250)
• States make a request(Article 252)
• To implement international agreements(Article 253)
• During the President's rule (Article 356).