This is a temporary category to identify articles which need to be assessed by the Citizendium Council for their suitability to include a citable version subpage. It is required because, when most approved articles have been switched over to the new system (see below), that category will likely disappear, and with it any record of approved articles that are yet to be assessed.
The community voted to swop around the main and draft versions of approved articles by referendum in August 2013, so that the main article is always the latest version and can be edited, while a subpage is locked. See the Citable versions of articles category.