The Parliament can make any law for whole or any part of India for implementing international treaties.

Under Article 253 of the Constitution of India, the Parliament possesses the overriding power to legislate for the whole or any part of India to implement international treaties, agreements, or conventions [2]. This provision begins with a 'notwithstanding' clause, which allows the Parliament to enact laws even on subjects enumerated in the State List if such legislation is necessary to fulfill international obligations. Unlike other provisions that require state consent (such as Article 252), Article 253 grants the Union Parliament exclusive authority to ensure India's credibility in global relations without needing the consent of any state. This ensures that the federal distribution of powers does not hinder the central government's ability to perform its external sovereign functions [2]. Consequently, the Parliament can make such laws without the consent of any state, regardless of whether the subject matter falls under the State List.

Sources

1. [2] https://legalaffairs.gov.in/sites/default/files/Treaty-making%20power%20under%20our%20Constitution.pdf