The standard recommends default sets of procedures for converting specific emissions from energy-conversion plants to allow reliable and unambigious comparision of various plant emission data. Exaust flows and their constituents, emitted by energy-conversion are measured or computed. Specific emissions relative to the volumes of exhaust, energy input, or energy output can be determined for the purpose of making various types of comparisions. In the new issue of this standard, especially, the data of characteristic fuels has been updated and new data for biofuels has been added.