The Australian government is conducting an independent review of websites due to be blocked by its controversial internet filter.
The project has attracted widespread criticism over what is perceived by some as government censorship.
Geordie Guy, vice chairman of the online liberties and rights watchdog Electronic Frontiers, told BBC News that the filtering was tied in with a rating that does not exist anywhere else in the world.
http://news.bbc.co.uk/2/hi/technology/10568361.stm