Both the United States and Iran are parties to the Nuclear Non-Proliferation Treaty (NPT). The United States and other countries were alleged during the May 2005 NPT meeting to be in violation of the NPT through Article VI, which requires them to disarm. The IAEA has stated that Iran is in violation of a Safeguards Agreement related to the NPT, due to insufficient reporting of nuclear material, its processing and its use. Under Article IV, the treaty gives non-nuclear states the right to develop civilian nuclear energy programs. From 2003 to early 2006, tensions mounted between the United States and Iran while IAEA inspections of sensitive nuclear industry sites in Iran continued.