A/HRC/37/37/Add.1 IX. Follow-up activities undertaken by mandate holders (non-exhaustive list) (2017) A. Follow-up on communications In 2017, 164 follow-up communications were sent out of a total of 534 communications; constituting 31 % (see Annex VI). In addition, the following 5 mandate holders issued observations on communications: Special Rapporteur on the situation of human rights defenders Observations on communications transmitted to Governments and replies received (A/HRC/34/52/Add.1) Special Rapporteur on the right to freedom of assembly and of association Observations on communications transmitted to Governments and replies received (A/HRC/35/28/Add.3) Special Rapporteur on extrajudicial, Observations on communications transmitted to Governments and replies summary or arbitrary executions received (A/HRC/35/23/Add.2) Special Rapporteur on torture and other cruel, inhuman or degrading treatment of punishment Observations on communications transmitted to Governments and replies received (A/HRC/34/54/Add.3) Working Group on enforced or involuntary disappearances Observations on communications included in the post-sessional documents and annual reports of the Working Group (A/HRC/36/39, A/HRC/WGEID/111/1, and A/HRC/WGEID/112/1) B. Follow-up country visits 4 mandate holders conducted in total 6 follow-up visits: Special Rapporteur on the rights to freedom of peaceful assembly and of association Report of the follow-up visit to the United States (A/HRC/35/28/Add.1). Special Rapporteur on the rights of indigenous peoples Country visit to the USA from 22 February to 3 March 2017 following up on the visit of the previous Special Rapporteur in 2012. The report was presented to the 36th session of the Human Rights Council in September 2017 (A/HRC/36/46/Add.1) Country visit to Australia from 20 March to 3 April 2017 following up on the visit of the previous Special Rapporteur in 2009. The report was presented to the 36th session of the Human Rights Council in September 2017 (A/HRC/36/46/Add.2) Working Group on arbitrary detention Country visit to Argentina from 4 to 15 December 2017 following up a visit of the Working Group in 2003. The report will be presented to the Human Rights Council in September 2018. Special Rapporteur on contemporary The Special Rapporteur conducted visits to Mauritania and the Niger in April forms of slavery, including its causes and August 2017, respectively, in order to conduct workshops to assess the and consequences implementation of the mandate’s previous recommendations (A/HRC/36/43). C. Follow-up reports 3 mandates presented reports in which they followed-up on their recommendations made to States: Working Group on Enforced or Involuntary Disappearances Follow-up report on the implementation of recommendations made following past visits to Chile and Spain (A/HRC/36/39/Add.3). 25