Speaker

Speaker, is the guardian of the privileges of the House. His function is to regulate debate and enforce the observance of the rules which govern its conduct. He is also representative of the House in the external relations. The quality most essential to the Speaker is strict impartiality. He is also vested with wide discretionary powers. His rulings constitute precedents which guide the future Speaker. Great privilege is attached to this office, his authority is recognized and respected by members on all sides of the House, Office of the Speaker in the Parliaments of Commonwealth, Wilding and Philip Laundy, p. 703.

Speaker, is the principal Presiding Officer of the Lower House of Parliament, Webster American Dictionary, p. 1398