Recently I met with The Victorian Law Reform Commission who is presently reviewing options for how the law could be improved.
This is a very good read.
http://lawreform.vic.gov.au/all-projects/funeral-and-burial-instructions-0
http://www.abc.net.au/radionational/programs/lawreport/funeral-rights-who-has-say-over-your-dead-body/7137684