and Malaysia: claiming storm damage, seven PLA Navy vessels entered the area to repair "fishing shelters" in Panganiban Reef (Mischief Reef); Malaysia erected a structure on Investigator Shoal and landed at Rizal Reef (Commodore Reef). In response, the Philippines lodged formal protests, demanded the removal of the structures, increased naval patrols in Kalayaan, and issued invitations to American politicians to inspect the PRC bases by plane. Declaration on the Conduct of Parties in the South China Sea, 2002 On 4 November 2002 in Phnom Penh, the Declaration on the Conduct of Parties in the South China Sea was signed by the 10 foreign ministers of ASEAN countries and China (PRC). The parties explicitly undertook in this declaration, "to resolve their territorial and jurisdictional disputes by peaceful means, without resorting to the threat or use of force, through friendly consultations and negotiations by sovereign states directly concerned". The parties also undertook to exercise self-restraint with activities that would complicate or escalate disputes and affect peace and stability, including refraining from inhabiting the presently uninhabited islands, reefs, shoals, cays, and other features. The parties pledged to carry out confidence building measures, such as: holding dialogues and exchange of views as appropriate between their defence and military officials; ensuring just and humane treatment of all persons who are in danger or distress; notifying on a voluntary basis other parties concerned of any impending joint / combined military exercise; and exchanging, on a voluntary basis, relevant information. The parties may also explore or undertake cooperative activities such as: marine environmental protection; marine scientific research; safety of navigation and communication at sea; search and rescue operations; and combating transnational crime, including but not limited to trafficking in illicit drugs, piracy, armed robbery at sea, and illegal traffic in arms. The declaration eases tensions, but falls short of a legally binding code of conduct. Code of Conduct in the South China Sea In July 2012, China (PRC) announced that it is open to launching discussions on the Code of Conduct in the South China Sea, but called for all parties to exercise self-restraint in keeping with the spirit of previous declarations and United Nation conventions. This announcement has been criticised by many neighbouring states because of the contradictions seen in the Scarborough Shoal at that time where China has established de facto control. On 2 August 2012, the United States Senate unanimously passed a resolution declaring