Discuss (c) reasonable use

The correlative rights doctrine comes from shared-reservoir natural resources law (its classic home: oil and gas in a common formation). Its content:1. A subsurface resource often underlies many owners' land; the reservoir is one physical body.2. Each surface owner holds a correlative right to a fair share of the common resource and to reasonable, non-wasteful extraction.3. No owner may capture wastefully to the prejudice of the others; the state may regulate spacing, rates, and conservation to protect the correlative shares.Its energy-law use today: groundwater and geothermal aquifers, gas fields, and — by analogy — the shared watercourse: upstream and downstream users hold correlative interests in one hydrological body, which is why unilateral over-extraction is a wrong, not just a policy dispute. For Nepal: the doctrine frames transboundary river basins (with LAW5707's equitable-utilization framework) and any future shared-reservoir development (gas, geothermal).FeatureMeaningOne reservoirPhysical unity beneath divided titlesFair shareEach right-holder's correlative portionReasonable useNo waste, no injury to co-ownersState regulationConservation in the common interest