Germany doesn't. The government just decided not to implement blocking (after arguing about it for years). Anyone (worldwide) who hosts child porn will be contacted by the police and asked to delete it. (When that was tested in January, 99% of the offending sites were gone after four weeks.)
That's why I was so surprised. I only really followed the debate in Germany (that's where I'm from), not in the rest of Europe.
They're trying to get internet filters back through the Glücksspielstaatsvertrag (gambling act), so if you're interested in an uncensored internet in Germany, contact http://www.ak-zensur.de/ and see how you can help.
DA notices aren't legally enforceable though. Most newspapers comply voluntarily.
They're overseen by a committee of both government representatives and those from the press and news distribution (including Google's Europe head of PR)
