General Biosecurity Duty NSW.
http://weeds.dpi.nsw.gov.au/Weeds/Details/134
http://keyserver.lucidcentral.org/weeds/data/media/Html/centaurea_solstitialis.htm
http://www.environment.gov.au/cgi-bin/biodiversity/invasive/weeds/weeddetails.pl?taxon_id=4622
Centaurea solstitialis is listed in the following regions:
Canberra & Southern Tablelands | Albury, Wodonga
Maps
Huon Hill West