In July 1992, Azerbaijan ratified the Treaty on Conventional Armed Forces in Europe (CFE), which establishes comprehensive limits on key categories of conventional military equipment and provides for the destruction of weaponry in excess of those limits. Although Azerbaijan did not provide all data required by the treaty on its conventional forces at that time, it has accepted on-site inspections of forces on its territory. Azerbaijan approved the CFE flank agreement in May, 1997. It also has acceded to the nuclear Non-Proliferation Treaty as a non-nuclear weapons state. Azerbaijan participates in NATO's Partnership for Peace.