According to VIC Law for the charge of Unauthorised modification of data to cause impairment,

Crimes Act 1958 - SECT 247C

Unauthorised modification of data to cause impairment

247C. Unauthorised modification of data to cause impairment

A person who-

(a) causes any unauthorised modification of data held in a computer; and

(b) knows that the modification is unauthorised; and

(c) intends by the modification to impair access to, or to impair the reliability, security or operation of, any data held in a computer or is reckless as to any such impairment-

is guilty of an offence and liable to level 5 imprisonment (10 years maximum).

According to VIC Law for the charge of Unauthorised modification of data to cause impairment,
10 years

1. That the accused caused a modification of data held in a computer
2. The modification was unauthorised
3. The accused knew the modification was unauthorised
4. The accused inteded by the modification or was reckless as to the modification either
(i) impairing access to, or
(ii) impairing the reliability, security or operation of, any data held in a computer.

1. Factual Dispute

2. Authority

3. Duress

County Court