 He indicated as much in a speech to the Cortes on the day of his enthronement, saying that he would be "a loyal head of state who is ready to listen and understand, warn and advise as well as to defend the public interest at all times".While he is nominally chief executive, he is not politically responsible for exercising his powers.Per the Constitution, his acts are not valid unless countersigned by a minister, who then assumes political responsibility for the act in question.