The Wassenaar Agreement is an international treaty that controls the export of dual-use goods and technologies. These are items that can be used for both civilian and military purposes. The agreement aims to prevent the spread of advanced technology and weapons of mass destruction.

The Wassenaar Agreement was signed in 1996 by 33 countries and has since expanded to include 42 participating states. The agreement is named after the Dutch city of Wassenaar, where the first meeting was held.

The agreement maintains a list of controlled items, known as the Wassenaar Arrangement List of Dual-Use Goods and Technologies. This list covers a wide range of technologies, including materials, electronics, computers, software, sensors, and chemicals.

The list is updated annually to reflect changes in technology and global security concerns. The updates are agreed upon through consensus by the participating states and take effect six months after the decision is made.

Exporters of dual-use goods and technologies must obtain a license or authorization from their national authorities before exporting any controlled items. The national authorities must ensure that the goods and technologies will not be used for military purposes or contribute to the development of weapons of mass destruction.

The Wassenaar Agreement has been effective in preventing the spread of advanced technologies and weapons. It has also facilitated cooperation among participating states to combat the proliferation of sensitive technologies.

In conclusion, the Wassenaar Agreement List of Dual-Use Goods and Technologies is a vital tool in controlling the export of sensitive technologies. By maintaining this list and requiring licenses and authorizations for their export, the participating states can prevent the spread of advanced technologies that may contribute to the development of weapons of mass destruction. The annual updates to the list ensure that the agreement remains relevant and effective in keeping up with changing technologies and global security concerns.