Member for Western Victoria has slammed the state government for knocking back a bid to protect farmers from animal activists.
She said their unwillingness to support the bill demonstrated the government didn't understand or doesn't care about rural Victoria.
"This was an opportunity missed to support our farmers and to send a clear indication to animal rights extremists that they are not above the law, however politically motivated magistrates might have acted in the past," Mrs McArthur said.
She said she was pleased to support the bill's measures to prevent protestors from invading properties and filming whatever they like.
"I also particularly advocated the ban on drones being flown above these properties without restriction, which is not just dangerous but also an indefensible invasion of privacy," Mrs McArthur said.
She said the creation of an offence of aggravated trespass and minimum sentences was also important.
"For too long the law and some elements of our judiciary have sent the message to protestors that they can get away with anything," Mrs McArthur said.
She said farmers had the right to operate without fear of intimidation.
"It should be noted that the vast majority of farmers love their animals and do their very best to make exceptional welfare provision for those animals," Mrs McArthur said.
"After all, they are running a commercial business by and large and if they do not look after their animals properly, they do not have a business - they do not earn an income to feed their own family."
She also said she did not accept the Law Institute of Victoria's (LIV) claim that its representative was misunderstood at the hearing into the impact of animal activists.
The LIV said it did not want CCTV cameras on every Victorian farm.
"This is not a clarification, it's a complete reversal," Mrs McArthur said.
"The statement is completely disingenuous - the witness was clear at different stages throughout her evidence that LIV sought CCTV installation on all farms in Victoria.
"If her appearance before the committee doesn't reflect LIV's submission, that is a matter for them."
Mrs McArthur said the LIV should not be allowed to simply alter the transcript from the hearing.
"If they can't stand by their oral evidence, they should withdraw it entirely," she said.
The motion to support the Crimes Amendment (Trespass) Bill 2019 was rejected 13-36 in the Legislative Council on Wednesday.
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