At first, Daijokanin was stamped on the whole part of documents but in the later Nara period, only the 3 areas in the header, footer, and center, plus 1 area near the date were allowed to be stamped.
当初は文書の全面に太政官印を押していたが、奈良時代後期には文書の首尾と中間にあたる中央部の計3ヶ所と日付の付近に1ヶ所に限った。