Exemption for capital goods subject to bond, bank guarantee and export-obligation conditions; extensions allowed for disaster-affected units. Exemption applies to capital goods imported under paragraph 197, relieving duty above 25% ad valorem and additional duty under section 3, subject to conditions: production of a bond with bank guarantee for full duty at importation and a declaration at clearance binding the importer to pay on demand duty where paragraph 197 conditions are not met; export-obligation periods may be extended by Public Notice (generally to 31 March 2002, with a special earthquake-related extension to 31 March 2004) and amendments validate past actions notwithstanding judicial orders.