IAEA Guidelines for Nuclear Security (INFCIRC 225)
Although this document is neither treaty nor convention, it can nonetheless be termed as a cornerstone of nuclear security. It carries IAEA guidelines and recommendations to protect nuclear facilities and nuclear materials against intentional cases of theft, sabotage or mishandling during transportation. There are no signatories or acceded states for this document but wherever the peaceful use of nuclear energy is in practice these guidelines are abided with their true spirit.
The 2011 version (Rev.5) is basically designed to cope with emerging threats to nuclear materials like “nuclear terrorism”. This version of this document introduces new standards for nuclear security with compliance to CPPNM (2005).