अत ऊर्ध्वं चतुर्वर्षः पञ्चवर्षो वा कर्मण्यः पूर्णप्रमाणः ॥ कZ_०२.३०.१३ ॥
ata ūrdhvaṃ caturvarṣaḥ pañcavarṣo vā karmaṇyaḥ pūrṇa-pramāṇaḥ
Mula noon, ang may apat na taong gulang—o bilang alternatibo, limang taong gulang—ay angkop na para sa serbisyo at dapat ituring na nasa ganap na pamantayang sukat (ganap ang rating).
It builds administrative flexibility for differing breeds/conditions while still fixing a clear eligibility window for deployment and full rationing.