The States General have the right of inquiry (Article 70). They can by majority vote empower a commission that in public or secret hearings can investigate any subject. Any person in the Realm is obliged to appear and answer their questions; it is a crime not to obey. This right can be limited by formal law; delegation is possible. Sixteen such inquiries have been held since 1848, one of them, about the events in the Second World War, lasting from 1947 till 1956.