Looking at the link Ben posted and other nreta pages including http://www.nt.gov.au/nreta/wildlife/permits/nontoxicshot.html I get the impression that the NT is more permissive in regards to hevishot and tungsten/zinc matrix shot than Victoria?

Is there a schedule or table in the regs outlining precisely what "non toxic" varieties can be used (as there is in the Victorian regs) or is it open slather but really all academic because so few importers are game to bring in the "oddballs"?