Parliamentary privilege is a foundational constitutional protection that shields Members of Parliament and the institution itself from external legal accountability for legislative functions. It operates on the principle that legislators must perform their constitutional duty—debating, voting, and scrutinizing government—free from fear of civil or criminal prosecution. In Indian constitutional law, this privilege finds its basis in Article 105 of the Constitution of India, which provides two categories of immunity: first, freedom of speech and debate in Parliament cannot be questioned in any court, and second, no member can be held liable in court for any statement made or vote cast in Parliament. The doctrine extends beyond individual utterances to protect the collective integrity of parliamentary proceedings themselves; courts are constitutionally barred from inquiring into the regularity, validity, or purpose of what happens within the chamber. This is not merely a procedural immunity—it is a structural protection rooted in the separation of powers. Without it, the judiciary could potentially review legislative motives, chill free debate through litigation threats, and usurp the legislature's self-regulatory authority. The privilege acknowledges that legislators represent the public interest and must speak without self-censorship on matters of national importance, however controversial or unpopular their views. The mechanism of parliamentary privilege operates through distinct but interrelated elements that work together as a cohesive shield. First, the ratione materiae element protects statements made "in Parliament"—meaning within the chamber or officially sanctioned parliamentary committees, during debates, questions, votes, or legislative deliberation. Second, the ratione personae element extends protection to members acting in their capacity as parliamentarians, provided their utterances fall within parliamentary business. Third, the immunity is absolute and unconditional; a court cannot examine the truth, malice, or reasonableness of parliamentary statements to determine whether the privilege applies—the moment speech occurs in Parliament on a parliamentary matter, immunity attaches. Fourth, the privilege operates as a complete bar to legal proceedings; it is not merely a defence that must be pleaded and proved, but rather a jurisdictional limit that prevents courts from entertaining certain claims altogether. These elements interact to create a comprehensive protective zone: a member cannot be sued for defamation for statements made in parliamentary debate (ratione materiae + ratione personae + absolute immunity), cannot be cross-examined in court about their parliamentary utterances (absolute immunity + jurisdictional bar), and cannot have their parliamentary conduct reviewed for procedural irregularity (institutional autonomy). The privilege is intentionally broad because its purpose—ensuring uninhibited legislative function—demands no narrow exceptions that would invite litigation over boundaries. The consequences of parliamentary privilege operate asymmetrically: it creates immunity for parliamentarians but also imposes corresponding limits on remedies available to those harmed by parliamentary speech. If a member makes defamatory statements in Parliament about a citizen, the citizen has no recourse through civil suits for defamation, tort, or breach of privacy based on those parliamentary statements alone. The remedy does not exist because the privilege extinguishes the legal cause of action itself—the court lacks jurisdiction to entertain such claims. However, privilege does not extend beyond Parliament; if the same member repeats the statement outside Parliament (on television, in a newspaper, at a public meeting), full liability for defamation attaches. This distinction between parliamentary and extra-parliamentary speech is critical and frequently tested. Similarly, parliamentary privilege does not shield members from prosecution for crimes committed in Parliament (such as bribery, assault, or other felonies), nor does it protect statements made with the specific purpose of deceiving Parliament (such as knowingly providing false information to a parliamentary committee under oath, which may constitute perjury). The privilege also does not protect conduct wholly unrelated to parliamentary function—if a member uses the Parliament building to conduct extortion or runs an illegal business from their office, they face full criminal liability. Additionally, members remain subject to parliamentary discipline; the Parliament itself can expel, suspend, or censure its own members, and this internal disciplinary power operates independently of the privilege doctrine. Courts have consistently held that they cannot award damages for harm caused by parliamentary utterances, but Parliament retains absolute power to police its own members' conduct through its standing orders and disciplinary mechanisms.