What is the significance of the IAEA's 'Additional Protocol' in strengthening nuclear safeguards?

The significance of the IAEA's 'Additional Protocol' lies in its substantial strengthening of the IAEA's ability to verify that a state is not diverting nuclear material or pursuing undeclared nuclear activities. The Additional Protocol expands upon the safeguards agreements that states conclude with the IAEA under the Nuclear Non-Proliferation Treaty (NPT). While the original safeguards agreements primarily focus on declared nuclear facilities and mater....