However, with regard to the Ryo (the administrative and civil code) part, all rules and regulations except those regarding warehouse management and medical service are included in "Ryo-no-gige" (commentaries on the Ryo) and "Ryo-no-shuge," (commentaries on the Civil Statutes) which were produced as annotation books of the Ritsuryo codes in the early Heian period; thus it is possible to restore the contents of the Rho book.
しかし、令については、律令の注釈書として平安前期に編纂された『令義解』『令集解』に倉庫令・医疾令を除く全ての令が収録されており、復元可能となっている。