Our government's department of agriculture, forestry and fisheries published a government notice last month that contains a list of proposed Champion Trees - trees that will be given special protection under country law.
The trees mostly have some kind historic or cultural value, or in other cases are simply so old, large, or remarkable that they deserve being protected from casual removal, or irresponsible felling.
Read the notice and if you believe that a particular tree that you know of should be protected then do your civic duty and contact the department to let them know. There's a little more than 30 days left to comment on the proposed list!