Since 1998, the governments of both countries have started an intensive dialogue on nuclear nonproliferation and security issues. First meeting took place in 1998 between Foreign Secretary Shamshad Ahmad and Deputy Secretary of State Strobe Talbott to discuss the issues focusing on CTBT signature and ratification, FMCT negotiations, export controls, and a nuclear restraint regime. The October 1999 overthrow of the democratically elected Sharif government triggered an additional layer of sanctions under Section 508 of the Foreign Appropriations Act which includes restrictions on foreign military financing and economic assistance. US Government assistance to Pakistan was limited mainly to refugee and counter-narcotics assistance." At the height of the nuclear proliferation case in 2004, President George Bush delivering a policy statement at the National Defense University, President Bush proposed to reform the IAEA to combat the nuclear proliferation and quoted: "No state, under investigation for proliferation violations, should be allowed to serve on the IAEA Board of Governors—or on the new special committee. And any state currently on the Board that comes under investigation should be suspended from the Board."