Previous Document Computer Misuse Act 1990 (UK) Section 18 18.(1) This Act may be cited as the Computer Misuse Act 1990. (2) This Act shall come into force at the end of a period of two months beginning with the day on which it is passed. (3) An offence is not committed under this Act unless every act or other event proof of which is required for conviction of the offence takes place after this Act comes into force.