This paper discusses Australian state-level public interest disclosure legislations and the extent to which legislative measures have been effective in protecting whistleblowers from workplace retaliation. It explores the identical and the different among legislations, which provide us multiple perspectives for reference in our future enacting a law. Whistleblower protection legislation becoming policy agenda and gaining advocates and acceptance derived from the Fitzgerald Report 1989, which indicated the needs to protect government employees who disclose wrongdoings relevant to public sector. To facilitate and encourage public interest disclosures, to ensure that disclosures are properly dealt with, and to ensure the protection of whistleblowers from reprisals are the core objects of those legislations. However, each existing law has its own weakness. There is no best practice model. The paper suggests our government to review the necessary to enact a similar law, and provides some initial opinions in legislation following the line that ”An appropriate disclosure of public interest information made by the proper person to a appropriate authority receives formal protection”.