In addition, Shiki was used not only as the detailed enforcement regulations of the ryo which was the administrative law, but also as legal basis (including such as 'kebiishi shiki' that enacted the placement of kebiishi (officials with judicial and police powers)) which were placed after the enforcement of ryo to complete the formation of officials outside of the ryo codes.
また、式は行政法である令の施行細則のみならず後にこれを補うために設置された令外官設置の根拠法規（検非違使設置を定めた「検非違使式」など）としても用いられた。