It is mandatory for the Annex I parties to account for the emissions and removal from afforestation, reforestation and deforestation, forest management and use of harvested wood products (HWPs) in the second Kyoto commitment period (2013-2020). Cropland and grazing land management, revegetation, wetland drainage and re-wetting are the voluntary LULUCF activities. The net removal of GHGs by LULUCF activities in an Annex I party is rewarded by granting the party with the right to issue removal units (RMUs). For the first commitment period (2008-2012), each party is assigned with a cap for RMUs.