The Usher of the Black Rod serves as the Governor-General’s messenger for ceremonial communications with the House. She leads the Royal Commissioners into the House at the Commission Opening of Parliament. At the State Opening the Governor-General sends the Usher of the Black Rod to summon members of Parliament to attend the speech from the Throne. She knocks three times on the door of the debating chamber. Only then does the Speaker permit entry so that Black Rod can inform members that the Governor-General commands their attendance.