1. Foreigners Tribunals: Established under the Foreigners (Tribunal) Order, 1964 - Correct. Foreigners Tribunals were indeed established under the Foreigners (Tribunal) Order, 1964 to adjudicate cases involving suspected foreigners, especially in Assam.
2. High Seas Treaty: Legally binding since 2023 under the United Nations Convention on the Law of the Sea (UNCLOS) - Incorrect. While the BBNJ Agreement, also known as the High Seas Treaty, is related to UNCLOS, it is not yet legally binding as it needs ratification by countries. As of August 2025, it has been signed by many countries, but not all have ratified it, including India.
3. Foreigners Tribunals: Can issue arrest warrants and detain individuals under the Immigration and Foreigners Act, 2025 - Correct. New provisions under the Immigration and Foreigners Act, 2025, do grant Foreigners Tribunals the authority to issue arrest warrants and detain individuals.
4. BBNJ Agreement: Mandates Environmental Impact Assessments (EIAs) for all oceanic projects - Correct. The BBNJ Agreement requires EIAs for major oceanic projects that could potentially harm the high seas, reflecting its focus on environmental protection.
Based on the above analysis, pairs 1, 3, and 4 are correctly matched.