In June 2006, Library and Archives Canada took over responsibility for the Government of Canada Core Subject Thesaurus from the Depository Services Program of Public Works and Government Services Canada. Thanks to joint funding in fiscal year 2006-2007 from the three Government of Canada information management lead agencies (Treasury Board Secretariat, Public Works and Government Services Canada and LAC), Library and Archives Canada is assuming management of the CST.
The CST Web site has been entirely revised and revamped. It now includes a search help section, links to other available versions, as well as online forms allowing users to suggest new terms or changes to the thesaurus. The thesaurus search interface was also simplified.