This can be seen from the fact that "Hososhiyo-sho" (The Essentials for the Judiciary), which is an accumulation of the Ritsuryo law and theories of Myobo-ke (scholars of the law), has no provisions for Nenki.
これは律令法及び明法家学説の集積である『法曹至要抄』に年紀に関する規定が無いことからも分かる。