Customs exemption for defence programme imports: specified ATV programme goods admitted duty free subject to certification and authorisation. Exemption relieves specified imported goods required for the Advance Technology Vessels Programme from the whole of customs duty in the First Schedule to the Customs Tariff Act and from the whole of the additional duty under section 3, when imported by Work Centres of the ATV Programme, designated Government agencies or public sector undertakings; importers must present at importation a certified list attesting need, non availability in India and authorised use, and Ministry authorisation.