As those that were approved had the privilege to be exempted from labor, farmers who became priests without official approvals were appeared, that was called shido, and priests by shido, called shidoso, were prohibited by Kokonritsu (Penal Law on Households and Marriage) and Soniryo (Regulations for Monks and Nuns), which were both part of Ritsuryo code.
得度者には課役を免除される特権があり、官の許可なく僧となる農民などが出現し、これらは私度、そうした僧は私度僧と呼ばれ、律令の編目である戸婚律や僧尼令で禁じられた。