Workshop on International Law, Natural Resources and Sustainable Development Collective Rights and Customary Use: Securing Sustainable Livelihoods in Law and in Practice Marcus Colchester Forest Peoples Programme Recent advances in international human rights law have recognised the rights of indigenous peoples to their customary lands, as well as their rights to self-governance, to represent themselves through their own institutions and to give or withhold their free, prior and informed consent to measures that may affect their rights. There is less clarity about the rights of other natural resources dependent communities. The Convention of Biological Diversity likewise calls on State Parties to protect and encourage sustainable customary use. Based on detailed field research and practical work with affected communities, this paper explores how these norms are being applied on the ground in the context of ‘land grabs’ and ‘green grabs’, mediated through IFI and IGO development policies, voluntary standards, national laws and policies and local political economic realities. Whereas, sustainable development has become a normal part of agency, investor and State discourse, the experiences of communities on the ground shows that such rhetoric does not include effective respect of international human rights norms. Yet, where rights are respected, both environmental and livelihood gains are notable.