Union Government
(1) There shall be freedom of speech in Parliament, subject to the Constitution and Parliament's own rules. (2) No MP is liable in any court for anything said or any vote given in Parliament or a committee, nor is anyone liable for the publication, under either House's authority, of any report, paper, votes or proceedings. (3) Other powers, privileges and immunities of each House, its members and committees, are as Parliament defines by law, and until then, as they stood immediately before the 44th Amendment's relevant section came into force. (4) These provisions extend to non-members who have a constitutional right to speak in a House or committee.
MPs have strong legal protection for what they say and how they vote inside Parliament - they cannot be sued or prosecuted in any court for it. This "parliamentary privilege" is essential for free and frank debate, letting MPs speak candidly without fear of external legal consequences for their parliamentary speech specifically.
An MP who makes serious allegations against someone during a Parliament debate generally cannot be sued for defamation over those specific in-House remarks, thanks to the freedom-of-speech protection in Article 105(2) - though the same statement made outside Parliament would not enjoy this immunity.