धातुसमुत्थं तज्जातकर्मान्तेषु प्रयोजयेत् ॥ कZ_०२.१२.१८ ॥
dhātusamutthaṃ tajjātakarmānteṣu prayojayet
Materials produced from an ore should be employed in the corresponding industries that arise from that ore.
To prevent diversion, ensure steady inputs for strategic industries, and improve accounting traceability from mine to finished goods.