1. The United Kingdom shall have sole responsibility for ensuring that all ores, source materials and special fissile materials covered by the Euratom Treaty and present on the territory of the United Kingdom at the end of the transition period are handled in accordance with relevant and applicable international treaties and conventions, including but not limited to international treaties and conventions on nuclear safety, safeguards, non-proliferation and physical protection of nuclear materials, and international treaties and conventions on safety of spent fuel management and the safety of radioactive waste management.

2. The United Kingdom shall have sole responsibility for ensuring its compliance with international obligations arising as a consequence of its membership of the International Atomic Energy Agency or as a consequence of the Treaty on the Non-Proliferation of Nuclear Weapons or any other relevant international treaties or conventions to which the United Kingdom is a party.