A State Party may lodge a complaint with the Depositary in case it believes that a nuclear facility on its territory has been attacked or is under threat of attack by any other State Party in breach of obligations deriving from the provisions of the Treaty. Such a complaint shall be accompanied by all possible evidence and other relevant information supporting the validity of the complaint. 11 Views were expressed that this provision calls for further discussion. Paragraph 2 First alternative CD/RW/WP.90 page 7 W~tbin ... days of the receipt of a complaint from any State Party the Oeposita~y shall initiate an investigation to ascertain facts relevant to the complaint. Such an investigation may include a fact-finding mission to or at the site of the nuclear facility concerned and to any other site as may be appropriate. The fact-finding mission shall submit its findings to the Depositary within ... days. Second alternative Within ... days of the receipt of a complaint from any State Party concerning an attack on a nuclear facility, the Depositary shall initiate an investigation of the alleged attack, including arrangements for a fact-finding mission on or at the site of the nuclear facility involved to ascertain the facts. The fact-finding mission shall submit the summary of its findings of fact to the Depositary at the earliest possible date. Paragraph 3 For purposes of carrying out a fact-finding mission the Depositary shall maintain a list of qualified experts, selected on as wide a geographical basis as possible, whose services may be available to undertake such missions. Paragraph 4 States Parties undertake to co-operate in carrying out the investigation which th~ Depositary may initiate on a complaint received from any State Party. The Depositary shall infonn the States Parties of the results of the investigation. Paragraph 5 First alternative 
**Analysis**
This text appears to be related to international treaties and agreements regarding nuclear facilities and the investigation of attacks or threats on such facilities. It outlines the procedures for submitting complaints, conducting fact-finding missions, and maintaining cooperation among states. The focus on international cooperation, treaties, and the handling of sensitive situations suggests a category related to international relations and global governance.

**Category**
International relations, Science and technology