From the 1^st of December, ECHA will <link https: echa.europa.eu _blank>manually check that all new registrations where the registrant has chosen to opt out of the data submitted jointly by co-registrants include a proper justification as required by REACH.

To help make sure that your justification is complete, use the templates in the latest version of IUCLID 6 and run the Validation Assistant on your data before submitting your dossier.