The Candidate List is a list of substances that have been officially identified as being of very high concern due to their hazardous properties in relation to the environment and/or human health. Companies will have to notify ECHA of the presence of such a substance in their articles not later than 6 months after the inclusion of such a substance in the Candidate List. For those substances included in the Candidate List by 1 December 2010, the relevant notifications have to be submitted not later than 1 June 2011.ECHA recently updated their online submission tool REACH-IT to allow the submission of notifications for substances in articles. They have also prepared a new Data Submission Manual for substances in articles, which can be downloaded as a PDF file here.
More information about the deadline and requirements can be found on the ECHA web site.