Tas govt unfazed by Bob Brown legal case

The Tasmanian government is unfazed by former Greens leader Bob Brown's High Court challenge of its anti-protest laws.

Dr Brown plans to challenge Tasmania's Workplaces (Protection from Protesters) Act, under which people protesting at forests and mines face fines of up to $10,000 and jail time.

The 71-year-old is among several people who have been charged over community protests at a logging site at Lapoinya in the state's northwest.

The act "impermissibly burdens the implied freedom of communication on government and political matters", according to a writ filed by Dr Brown's solicitor.

A notice of proceedings was delivered to the state government on Thursday.

But Tasmanian environment minister Matthew Groom is confident the Workplaces Act will stand up to Commonwealth scrutiny.

"We're very confident about the constitutionality of our laws," he told reporters.

"It's up to Bob Brown in terms of any legal avenues he may take but we feel confident that they will stand up to scrutiny in the High Court."

Tasmanian Greens leader Cassy O'Connor said the laws are driven by anti-environment ideology.

"We commend Dr Brown for challenging this extreme law in the High Court, where we believe it will be found wanting under the Constitution," she said.

Dr Brown and another protester were arrested in January after police asked them to leave a community protest over logging in the Lapoinya forest.

They are due to face Hobart Magistrates Court on Friday.