As of March 5, 2009 CanLII will be providing access to older versions of federal legislation as well as legislation from Alberta, Saskatchewan, Ontario and Quebec. Coverage will go back at least 5 years. Users can compare different versions of a particular statute, find a statute as it was in force on a particular date, noteup specific sections of a statute, link to cases that have considered that statute or subscribe to an RSS feed which keeps track of changes to a particular statute. CanLII has plans to add statutes and regulations for the remaining jurisdictions by the end of the summer of 2009.
Posted by Susan Barker 
