Orders and intents which were, in principle, transmitted orally to Shokei from Kurodo no to were called 'Kuzen' (oral decree), but those which were put into document form later were called 'Kuzenan' (a paper that was made to tell imperial order).
また、蔵人頭が上卿に伝える時は、口頭が原則で「口宣｣と呼ばれたが、後に文書化され、「口宣案」とよばれた。