The ICOS BADM (Biological, Ancillary, Disturbance and Metadata) is the system used to submit non-continuous data, metadata and information to the ICOS ETC. It is based on an international system agreed across the flux networks globally (in particular between AmeriFlux and the European Database) but adapted to the specific needs of ICOS. In this document the general structure of the ICOS BADM, the different type of variables and the options are described. Then instructions on how to fill in an ICOS BADM are provided.