The document discusses barriers and challenges to effective benefit sharing under REDD+. Group 1 notes challenges in determining benefits due to a changing scope for REDD+ over time and differing contexts. Group 2 discusses barriers to determining who should benefit, including defining carbon rights and deciding on constituencies. Group 3 identifies challenges in linking benefit sharing mechanisms at local, sub-national and national levels due to differences in rights understanding, knowledge gaps, and institutional arrangements. Group 4 discusses ensuring benefit sharing is effective, efficient and equitable while balancing performance and equity considerations across scales.