Customs duty exemption for quarrying goods subject to approval, bonds, usage verification and export oriented unit compliance. The notification exempts specified goods from customs duty when imported or procured for use in granite quarries by approved export oriented units or units in designated Free Trade/Export Processing Zones, subject to approval, exclusive use for quarrying and further processing for export, execution of a bond securing export obligations and duty recovery with interest where conditions are unmet, maintenance of detailed accounts and site records, and customs oversight over removal, re export, repairs, transfers and duty payment in cases of clearance to other places.