B. Stakeholder engagement strategy In its decision IPBES/1/2 , the Plenary had invited the International Union for Conservation of Nature ( IUCN ) and the International Council for Science ( ICSU ) to work with relevant stakeholders , including indigenous peoples and local communities and the private sector , and with the secretariat , to prepare in consultation with the Bureau and the Multidisciplinary Expert Panel a draft stakeholder engagement strategy for supporting the implementation of the Panel 's work programme .