Pest plant ACT. General Biosecurity NSW with additional restrictions all NSW (as Cortaderia species).
http://weeds.dpi.nsw.gov.au/Weeds/Details/100
http://keyserver.lucidcentral.org/weeds/data/media/Html/cortaderia_selloana.htm
Cortaderia selloana is listed in the following regions:
Canberra & Southern Tablelands | South Coast | Greater Sydney | South East South Australia