In 719, however, as to exchanges of documents between Sogo (a monk of a managerial post)/Sango (three monastic positions with management roles at a temple) and Zokkan government officials, having used cho because fundamentally no hierarchical relationship existed between them, it was stipulated that a form of "i" (移) should be used by replacing Chinese characters "i" (移) with "cho."
ところが、養老3年（719年）には、本来所管・被管関係にないために牒でやり取りが行われていたと見られる僧綱・三綱と俗官官司との文書のやり取りは、「移」とあるべきところを「牒」と置き換えた上で移の書式をもって作成することとされた。