Telstra operations are governed by a number of Federal Acts of Parliament.
The release of information from the Unwelcome Calls Centre is also strictly controlled. You can view the ACIF Code for the Handling of Life Threatening and Unwelcome Calls.
For more information check the links below:
Part 13 of the Telecommunication Act 1997 (The Act)
Privacy Act 1988
Crimes Act 1914
All of the acts above can be accessed via the Attorney General's Department website SCALEplus.
Also copies of "The Act" can be obtained from Government publication outlets.