Although it was not defined which of the toso and seiso the students were to belong at the beginning, when monjosho became Monjo tokugosho (Distinguished Scholars of Letters) and took taisaku (civil service examination), it was decided that the Monjo hakase of the so other than that the monjosho belonged to set the examination, which meant that the monjosho had to belong to either the toso or the seiso by that time.
当初は学生が東西いずれの曹に属するかという規定は定まっていなかったが、文章生が文章得業生となり対策を受ける際には所属する曹とは反対の曹の文章博士から出題を受けることとなっていたため、当然その頃にはいずれかの曹に属していなければならなかった。