A/HRC/30/36 person concerned released. In accordance with Human Rights Council resolution 5/2, the Working Group integrated into its methods of work the prescriptions of the Code of Conduct for Special Procedures Mandate-holders of the Human Rights Council relating to urgent appeals and has since applied them. 40. During the period under review, the Working Group also sent six letters of allegation to Australia, Iraq, Libya, Nigeria, the Syrian Arab Republic and Uganda. 41. The Working Group wishes to thank those Governments that heeded its appeals and that took steps to provide it with information on the situation of the persons concerned, especially the Governments that released those persons. In other cases, the Working Group was assured that the detainees concerned would receive fair trial guarantees. B. Country visits 1. Requests for visits 42. The Working Group has been invited to visit Argentina (follow-up visit), Azerbaijan, Burkina Faso, India, Japan, Libya, Malta (follow-up visit), Nauru, Spain and the United States of America, as well as the State of Palestine. 43. As indicated in paragraph 5 above, on 24 March 2014 the Government of Nauru cancelled the scheduled visit of the Working Group, and has yet not accepted the new proposed dates for the visit. 44. The Working Group has also asked to visit Algeria, the Democratic People’s Republic of Korea, Egypt, Ethiopia, Fiji, Guatemala, Guinea-Bissau, Kazakhstan, Kenya, Myanmar, Papua New Guinea, the Philippines, the Republic of Korea, the Russian Federation, Rwanda, Saudi Arabia, Sierra Leone, Singapore, the Syrian Arab Republic, Thailand, Turkmenistan, Uganda, Uzbekistan and the Bolivarian Republic of Venezuela. The Working Group has also sent requests for follow-up visits to Bahrain, China, Indonesia, Malaysia, Mexico Nicaragua (limited to Bluefields) and Viet Nam. 2. Follow-up to country visits 45. In accordance with its methods of work, the Working Group decided in 1998 to address follow-up letters to the Governments of countries it had visited, requesting information on such initiatives as the authorities might have taken to give effect to the relevant recommendations adopted by the Working Group contained in the reports on its country visits (see E/CN.4/1999/63, para. 36). 46. In 2014, the Working Group requested information from the Government of El Salvador, which it had visited in 2012. The Government submitted the requested information on 19 May 2015, that is, after the adoption of the present report. It will be considered at the next session of the Working Group and summarized in the next annual report. C. Consideration of the title of the Working Group 47. In its resolution 1991/42 establishing the Working Group on Arbitrary Detention, the Commission on Human Rights did not define the term “detention”. 48. The international human rights instruments that protect the right to personal liberty guarantee that no one shall be arbitrarily deprived of his or her liberty. The relevant international instruments do not always use the same terminology to refer to deprivation of 15