 At the investiture ceremony the Admonitions are read in turn by the prelate and chancellor of the order and several insignia are offered on a cushion to the Sovereign by Garter King of Arms , Black Rod , and the secretary of the order , in turn , so that the Sovereign may perform the ceremony of investiture . Two senior knights of the order assist the Sovereign in these ceremonies by placing the garter around the left leg of the new knight and by assisting the Sovereign in the fastening of the riband and Lesser George about the body of the new knight , and in the adjustment of the mantle and the collar . After the investiture ceremony at Windsor is concluded , a state luncheon is held in the Banqueting Room . This is attended by the royal family , by all the Companions of the Order and their spouses , and by the Officers of the Order . After the banquet all the knights and ladies of the order , together with the prelate , chancellor and other officers of the order , in their mantles and ceremonial robes , led by the Military Knights of Windsor , move in procession , watched by a great crowd of spectators , through the castle , down the hill , which is lined with troops , to Saint George 's Chapel for a worship service , before which the formal installation of the new knights takes place . 
