UK Law Computer Misuse Act 1990 and 2006 Simple Guidance

UK Law Computer Misuse Act 1990 and 2006 is an Act to make provision for securing computer material against unauthorised access or modification; and for connected purposes. Detail of legislation can be download here:
http://www.opsi.gov.uk/acts/acts1990/ukpga_19900018_en_1.htm

Basically this Law govern there things:

1. Unauthorized access
You need to be able to prove the suspect knew his access was not authorized. The maximum prison sentence is six months imprisonment or £5000 or both.

2. Unauthorized access with intent to commit or facilitate commission of further offences
You need to be able to prove the suspect carried out the hacking to further some other criminal intention, such as theft. The penalties are the same as for unauthorized access.

3. Unauthorized modification of computer material
This is aimed at vandals and those who manufacture worms or computer viruses. Carries a five-year prison sentence and an unlimited fine.