The old Kotofu Rei did not regulate external use of the Kotofu, while the existing Kotofu Rei permits use of the Kutofu outside the Department of Kuranokami (which also read Shozo, referring to Lady of the Storehouse and Director of Zoshi) only when the prime minister approves of it (the existing Article 6).
旧令では皇統譜の持ち出しに関しては定めていないが、現行令では内閣総理大臣の承認を得た場合に限って、尚蔵の部局外に持ち出すことを認めた（現6条）。