A consensus has emerged with regard to the governance of attacks against information systems. EU Member States will now harmonise their legislation to render illegal any act undertaken with the intention of compromising information stored on computers or networks. Unauthorised access or interference will now be illegal.
The decision of the JHA can be found here (pdf)
More material
CSIRT Handbook
http://www.edri.org/edrigram/number3.5/attacks
http://www.iht.com/articles/88499.htm
http://ue.eu.int/pressData/en/jha/74719.pdf
From Cyberbug