Sections 2.7010 of the Commonwealth Criminal Code states:

28. Any person who, by violence or threats or intimidation of any kind, hinders or interferes with the free exercise or performance, by any other person, of any political right or duty, shall be guilty of an offence.

The Maximum penalty for the offence of Interfering with Political Liberty is 3 years imprisonment.

beyond a reasonable doubt.

The accused who, by violence or threats or intimidation of any kind, hindered or interfered with the free exercise or performance, by any other person, of any political right or duty.

Possible defences to this offence include but are not limited to

 The accused did not by violence or threats or intimidation of any kind, hindered or interfered with the free exercise or performance, by any other person, of any political right or duty.

This matter is Commonwealth Offence which means it is dealt with in the District Court or the Magistrates Court at the election of the prosecution.