A/HRC/42/33 31. From 15 to 22 February 2018, in Aden, OHCHR conducted a working visit to the National Commission and provided it with further expertise to develop its methods of investigation in line with international standards. 32. From 3 to 5 March 2018, in Amman, OHCHR organized a workshop for the commissioners on protecting human rights and the rule of law in the context of countering terrorism. It showcased best practices of law enforcement activity in countering terrorism, including with regard to conducting arrests, detentions and interviews of terrorist suspects in full compliance with international human rights law. 33. From 12 to 14 March 2018, in Beirut, OHCHR conducted a training workshop on investigation methodology for human rights violations for 14 investigators of the Commission, including 2 women. This included sessions on investigations into sexual violence and in prisons and detention facilities. 34. From 3 to 5 April 2018, also in Beirut, OHCHR conducted a workshop for the administrative staff of the National Commission on best practices in archiving, information protection and financial aspects. 35. From 17 to 20 July 2018, in Amman, OHCHR organized a seminar for the commissioners on international humanitarian law in the context of the conflict in Yemen. 36. From 14 to 16 August 2018, also in Amman, OHCHR organized a workshop for 17 field monitors of the National Commission, including 8 women, on human rights monitoring guidelines in line with international standards. 37. From 17 to 19 February 2019, in Aden, OHCHR facilitated a retreat for 38 field monitors and investigators, including 10 women, to enhance the professional relationship between the commissioners and the field monitors and investigators. Participants subsequently reported that the retreat had significantly contributed to enhancing effective working relationships within the National Commission. 38. From 22 to 24 March 2019, in Amman, OHCHR conducted an advanced training, attended by 32 field monitors, including 8 women, on interactive techniques for monitoring and documenting violations of international human rights and humanitarian law in Yemen. 39. From 30 April to 7 May 2019, in Addis Ababa, OHCHR organized, in cooperation with the Operational Satellite Applications Programme (UNOSAT), a training workshop for the commissioners to strengthen their technical capacity in the use of geospatial information technology, with a focus on cloud-based and geospatial data systems for decision-making related to accessing and analysing human rights violations. 40. Following a request by the National Commission, OHCHR purchased 30 solar charging system units for the field monitors, which it delivered to the Commission in Aden in June 2019. 41. More broadly, OHCHR delivered technical assistance to the National Commission through regular feedback and advice to improve its performance. It further supported the Commission in developing methodologies, manuals and tools, providing it with a range of supplementary material on international human rights law and humanitarian law, human rights monitoring and administrative and financial matters. 42. The technical assistance provided by OHCHR has included increasing understanding by the National Commission of the concept of accountability, as guided by relevant international norms. OHCHR focused on the rights of victims of human rights violations under international law, including the rights to truth, justice and reparation, for example through institutional guarantees of non-recurrence. It has advised that there should be accountability for human rights violations and abuses, which require redress regardless of whether they were committed by a State or non-State actors. Furthermore, OHCHR has provided expertise to the Commission on transitional justice and how accountability should go beyond the investigation and prosecution of serious crimes, consisting of a broader process that addresses the political, legal and moral responsibility of individuals and institutions for past and ongoing violations. 6