The term "parliamentary privilege" refers to two significant aspects of the law relating to Parliament, the privileges or immunities of the Houses of the Parliament and the powers of the Houses to protect the integrity of their processes. These immunities and powers are very extensive. They are deeply ingrained in the history of free institutions, which could not have survived without them.
Parliamentary privilege and the Senate
Relationship between immunities and powers
Immunities and powers part of ordinary law
Immunities of the Houses
Powers of the Houses
Statutory definition of contempt