Mitchell Landrigan (University of Technology Sydney (UTS)) has posted Protests Outside Abortion Clinics Constitutionally Protected Speech? (Alternative Law Journal 41(1) 2016) on SSRN. Here is the abstract:
This article focuses on whether, by banning anti-abortion protests in safe access zones, the legislation might infringe the implied freedom of political discourse under the Constitution of the Commonwealth of Australia. It reviews the buffer zone legislation in Victoria, Tasmania and the ACT.