A/HRC/25/19 6. Progressive development of international law 98. During my term as High Commissioner, substantial progress has been registered in the normative development of economic, social and cultural rights. The Optional Protocol to the International Covenant on Economic, Social and Cultural Rights entered into force in May, constituting a historical development that reaffirmed the justiciability of economic, social and cultural rights. 99. In 2013, several treaty bodies supported by OHCHR adopted general comments and recommendations addressing economic, social and cultural rights. The Committee on the Rights of the Child adopted a general comment on the right of the child to health, while the Committee on the Protection of the Rights of All Migrant Workers and Members of Their Families adopted a general comment on the rights of migrant workers in an irregular situation. The Committee on the Elimination of Discrimination against Women adopted general recommendations on the economic consequences of marriage, family relations and their dissolution, and on women in conflict prevention, conflict and post-conflict situations. The Committee on the Elimination of Racial Discrimination adopted a general recommendation on combating racist hate speech. 100. In collaboration with the Working Group on the issue of human rights and transnational corporations and other business enterprises, OHCHR convened the second annual Forum on Business and Human Rights in December, which gathered more than 1,700 participants. In August, in Medellin, Colombia, it supported the organization of the first Regional Forum on Business and Human Rights. OHCHR advocated for the promotion of the Guiding Principles on Business and Human Rights within the United Nations, following the recommendations of the Secretary-General,17 and provided interpretive guidance on the application of the Guiding Principles to stakeholders. III. Conclusions 101. OHCHR has continued to build in significant and vital ways on the advances made since it was established more than 20 years ago. In the exercise of its mandate, OHCHR has further ensured that the centrality of human rights to the work of the United Nations system as a whole is recognized as it significantly contributed to the promotion of the full realization of all human rights for all. 102. My Office has provided strong substantive support to the United Nations human rights mechanisms with a view to maximising their efficiency and responsiveness to all human rights violations. 103. OHCHR has become an increasingly authoritative advocate for victims of human rights violations across the globe. It is a voice for the voiceless, reminding States of their commitments under international human rights law. 104. In an increasingly complex world, we need to do our utmost to revive the spirit of the Vienna Declaration, which articulated with unequivocal clarity the inherent nature of the dignity and human rights that belong to all human beings, regardless of their differences, and the universal, indivisible, interdependent and interrelated nature of all human rights. We also need to fulfil the promises made in the Durban Declaration and Programme of Action and the Durban Review outcome document, and advance in the global struggle against racism and xenophobia. 17 18 See A/HRC/21/21.