To ensure the orderly flow of business, the House of Commons observes parliamentary rules and traditions, both written and unwritten. It is the Speaker's duty to interpret these rules impartially, to maintain order, and to defend the rights and privileges of Members.
As required, the Speaker makes formal decisions or rulings on the procedural acceptability of specific matters before the House and about questions of parliamentary privilege. Unless otherwise specified, Speaker’s rulings serve as precedent to govern future proceedings. Speaker’s rulings are typically made by the Speaker, but they may occasionally be made by other Presiding Officers.