विंशतिवर्षो ग्राह्यः ॥ कZ_०२.३१.०९ ॥
viṃśativarṣo grāhyaḥ
二十歳の象は受け入れるに適する(国家の役用・調達/訓練の対象となる)。
Set a baseline age-eligibility: accept elephants at about twenty years for state service.
To standardize procurement and reduce risk—very young or very old elephants are less predictable in performance, health, and training outcomes.