There is a possibility that there were provisions under Omi-Ryo (Omi administrative code) or Asukakiyomihararyo (the legal code of Japanese ancient state) that preceded the Taiho code but since neither exists in print, details are unknown.
先行する近江令・飛鳥浄御原令に何らかの規定があった可能性はあるが、両者とも現存しないため、詳細は不明である。