A/HRC/21/21 funding area in peacebuilding support. The Guiding Principles may also be relevant to the work of United Nations peacekeeping operations. (e) Humanitarian action 56. With the increasing quantity and range of non-State actors present in humanitarian action, including post-conflict or disaster construction work, standards for the human rights responsibilities of business activities are increasingly relevant. The Inter-Agency Standing Committee and the Office for the Coordination of Humanitarian Affairs should take the lead in exploring how the integration of the Guiding Principles can ensure coherence and contribute to reducing the adverse impact on human rights of business activities in humanitarian situations. 57. UNEP work in post-conflict and disaster settings, including on environmental impact assessments and associated capacity-building programmes, provides another entry point. (f) Labour 58. In addition to existing efforts, there is scope for increased collaboration and coordination between ILO, United Nations human rights bodies and OHCHR to ensure alignment between implementation of international labour standards and efforts aimed at promoting the implementation of the Guiding Principles. The tripartite structure of ILO provides important channels to reinforce efforts involving States, business and trade unions to promote implementation of the Guiding Principles. Collaboration could also include reciprocal efforts to coordinate work at the country level and to establish relations with a broader constituency. (g) Other areas 59. Notable efforts to integrate the Guiding Principles on work relating to, for example, children and indigenous peoples, are already being made. Similarly, the Guiding Principles should also be incorporated into policies and programming in other areas covered by the United Nations system, such as education, health, HIV/AIDS, women, internal displacement, housing and migration, which intersect with business-related human rights issues. C. Capacity-building of relevant actors 60. Lack of capacity among States, business enterprises, national human rights institutions and other actors in the area of business and human rights has been identified as a key challenge to ensuring the implementation of the Guiding Principles in practice. 19 This is also reflected in Human Rights Council resolution 17/4, in which the Council specifically requested the Secretary-General to identify how the United Nations system as a whole could address the need for capacity-building of all relevant actors. 61. Supporting efforts to promote capacity-building among relevant actors is one of the tasks assigned to the Working Group on the issue of human rights and transnational corporations and other business enterprises.20 Given the scale of its task, however, the 19 20 12 See www.business-humanrights.org/media/documents/ruggie/ruggie-special-mandate-follow-up-11feb-2011.pdf. Human Rights Council resolution 17/4, para. 6 (c).