Customs tariff amendment adds a pipeline infrastructure project to the exemption list, expanding customs relief for development. The Central Government, exercising tariff powers under the First Schedule to the Customs Tariff Act, 1975, substitutes serial number 18 in the principal exemption notification with the entry 'Vishakh - Vijaywada - Secunderbad Pipeline Project,' thereby updating the list of projects covered by the exemption regime on grounds of economic development.