They were annually rated using the three-point scale of Jo, Chu, Ge, and were conferred on the ranks higher by up to three based on the rating of eight years (according to the law in 706, this rule was operated based on a six years rating in fact).
毎年上・中・下の3等で評価され、8年分の評価（ただし706年の格式で実際には6年分の評価で運用）に基づいて最大で3階相当分の叙位が行われた。