A review of the NPT in 2010 failed to reach consensus on U.S. efforts to make the additional protocols mandatory.
Other multilateral, informal organizations also play a role in implementing and enforcing the NPT, notably the Nuclear Suppliers Group (NSG). Made up of forty-six advanced nuclear states, the NSG prohibits the transfer of civilian nuclear materials or technology to states outside the NPT, or those that do not fully comply with IAEA safeguards. However, the NSG's export bans are not legally binding, and members (including the United States, Russia, and China) have taken advantage of the weakness of the NSG regime to pursue civilian nuclear projects with non-NPT members.