Police Offences Act 1935

A person who, with intent to defraud –

destroys, damages, erases, alters or otherwise manipulates data stored in, or used in connection with, a computer; or introduces into, or records or stores in, a computer or system of computers by any means data for the purpose of – destroying, damaging, erasing or altering other data stored in that computer or that system of computers; or interfering with, interrupting or obstructing the lawful use of that computer or that system of computers or the data stored in that computer or system of computers; or otherwise uses a computer –

is guilty of an offence and is liable on summary conviction to a fine not exceeding 20 penalty units and imprisonment for a term not exceeding 2 years.