According to VIC Law for the charge of Extortion with threats to kill,
Section 27 Crimes Act 1958 Extortion with threat to kill

27. Extortion with threat to kill

A person who makes a demand of another person-

   (a)  with a threat to kill or inflict injury on a person (other than the
        offender or an accomplice of the offender); or

   (b)  with a threat 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-

is guilty of an indictable offence.

According to VIC Law for the charge of Extortion with threats to kill,
15 years imprisonment

(a) The accused made a demand of another person.

(b) The demand was made with a threat to kill or inflict injury on a person other than the offender or his or her accomplice, or 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.

(a) Duress.

(b) Factual dispute.

(c) Lack of intent.

(d) Mental impairment.

(e) Necessity.

County Court