The Cardinal Camerlengo presides over the Apostolic Camera to which is entrusted the administration of the property and protection of other papal temporal powers and rights of the Holy See during the period of the empty throne or sede vacante (papal vacancy). Those of the Vatican State remain under the control of the Pontifical Commission for the State of Vatican City. Acting with three other cardinals chosen by lot every three days, one from each order of cardinals (cardinal bishop, cardinal priest, and cardinal deacon), he in a sense performs during that period the functions of head of state of Vatican City. All the decisions these four cardinals take must be approved by the College of Cardinals as a whole.