MoE Regulation No. 21/2008 concerning Emission Standard for Thermal Power Generation Activities requires thermal power plants to install a Continuous Emission Monitoring System (CEMS) and prepare an emission inventory for GHGs and air pollutants such as SO2, NOx and particulates emitted; Decree No. 13/1995 regarding the Emission Quality Standard for Fixed Sources: air emission standards for iron and steel, cement, pulp and paper, steam power plant, and similar large industries. Operators are obliged to provide their facilities with emission controls and the means to measure and test exhaust gas emissions. The results are to be reported to the local government with a copy to the Ministry of the Environment