According to VIC Law for the charge of Extortion with threats to destroy property,
Section 28 Crimes Act 1958 Extortion with threat to destroy property etc.

28. Extortion with threat to destroy property etc.

A person who makes a demand of another person with a threat to destroy, or endanger the safety of, a building, structure in the nature of a building, bridge, mine, aircraft, vessel, motor vehicle, railway engine or railway carriage is guilty of an indictable offence.

According to VIC Law for the charge of Extortion with threats to destroy property,
10 years imprisonment

1. That the accused made a demand of another person;
2. That the demand accompanied :

(i) a threat to destroy property; or
(ii)  a threat made in circumstances where if the threat were carried out, the life of a person other than the offender or an accomplice of the offender would be endangered.

1. Factual dispute

2. Lack of intent

County Court