A/HRC/28/41 the six years of the mandate. The Special Rapporteur on violence against women, its causes and consequences, addressed the developments witnessed within the United Nations with regard to the theme of violence against women.3 13. Some mandate holders contributed to the debate on the post-2015 development agenda, such as the mandate holders on human rights and international solidarity; minority issues; the rights of indigenous peoples; the human rights of migrants; and the independence of judges and lawyers. F. Contributions to standard-setting and the protection and promotion of human rights 14. In 2014, mandate holders continued to contribute to the progressive development of international human rights law by means of studies, consultations and the elaboration of guidelines in a variety of specific areas. For example, the Special Rapporteur on the human right to water and sanitation published a handbook for realizing the human right to safe drinking water and sanitation,4 aimed at providing all relevant actors with concrete guidance and tools on the meaning of this human right. The Special Rapporteur on trafficking in persons, especially women and children, issued a set of basic principles on the right to effective remedy for victims of trafficking in persons, 5 intended to be a “living tool” for practitioners and law enforcement officials to use in their daily anti-trafficking work. Pursuant to Council resolution 20/16, the Working Group on Arbitrary Detention embarked on the preparation of draft basic principles and guidelines on remedies and procedures on the right of anyone deprived of his or her liberty to bring proceedings before court. The draft will be presented to the Council at its thirtieth session. The Independent Expert on human rights and international solidarity presented a draft declaration on the right of peoples and individuals to international solidarity to the Council for its input.6 The draft embodies the evolution of international solidarity into a concrete right to address the structural causes of poverty, inequality and other global challenges that impede human rights. A revised draft will be submitted to the Council and the General Assembly by 2016. 15. Several reports submitted to the Council and the General Assembly contained recommendations for the development of international law, such as the recommendation of the Special Rapporteur on the promotion and protection of human rights while countering terrorism that the Human Rights Committee develop and adopt a general comment on the right to online privacy.7 The Special Rapporteur on extreme poverty recommended the drafting of an optional protocol to the International Covenant on Economic, Social and Cultural Rights or adapting the methods of work of the Committee on Economic, Social and Cultural Rights to monitor the implementation of social protection floors.8 The Special Rapporteur on violence against women recommended the conclusion of a legally binding instrument to combat violence against women that addresses gaps in international human rights law.9 The Working Group on the use of mercenaries as a means of violating human rights and impeding the exercise of the right of peoples to self-determination recommended the drafting of an internationally binding instrument on private military and security companies. The Independent Expert on the promotion of an equitable and democratic 3 4 5 6 7 8 9 A/HRC/26/38. A/HRC/27/55/Add.3. A/HRC/26/18, annex. A/HRC/26/34, annex. A/69/397, para. 64. A/69/297, paras. 61-62. A/69/368, para. 71. 5