Mineral oil extraction in the EEZ and continental shelf is within customs jurisdiction; imports and exports reclassified. The Customs Act, 1962 and the Customs Tariff Act, 1975 are extended to the whole EEZ and Continental Shelf for prospecting, extraction or production of mineral oils and for supply of goods in connection with those activities; mineral oils (including petroleum and natural gas) produced there and brought to the mainland are not treated as imports and hence not subject to customs duty, while goods from foreign countries to the EEZ/Continental Shelf for such activities are treated as imports and dutiable.