पौर्वपौरुषिकं निधिं जानपदः शुचिः स्वकरणेन समग्रं लभेत ॥ कZ_०४.१.५४ ॥
paurvapauruṣikaṃ nidhiṃ jānapadaḥ śuciḥ svakaraṇena samagraṃ labheta
A local resident of good repute, who by his own means (with his own implements/effort) recovers an ancestral or personally earned deposit/hoard, may obtain it in full.
The state claims windfall/strategic treasure but protects legitimate private property when provenance and claimant credibility are strong.