After Pre-registration:
Companies that have pre-registered their substances will benefit from the staggered registration deadlines (2010, 2013 or 2018) for their substances. Their next REACH obligation is to start data sharing in Substance Information Exchange Forums (SIEFs) after ECHA will have published the List of Pre-registered Substances. Companies may organise their data-sharing as they consider most appropriate. Some industry associations have tools ready to assist the data-sharing.
Companies starting to manufacture or import a substance at or above one tonne per year after 1 December for first time can benefit from late pre-registration provisions. This provision does not apply to those companies that have failed to meet the pre-registration deadline. Such companies cannot continue manufacturing or importing the substance until they have submitted a full registration dossier and paid the registration fee.
European Chemicals Agency