Companies registering the same substance must work together to compile and share information on the uses, hazards and risks of their substance to demonstrate safe use. If new data involving animal testing needs to be generated, alternatives must always be considered first. All this information on the uses, hazards and risks should be reported in a registration dossier and submitted to the European Chemicals Agency (ECHA) by 31 May 2018.
Source: https://echa.europa.eu/