Customs concession for liquefied natural gas extended subject to supply undertakings and duty with interest if conditions unmet. Amendment inserts a new tariff entry granting nil duty for LNG imported for generation at Dabhol by RGPPL or supplied to RGPPL, and for qualifying LNG mega power projects, subject to Condition No.103. Importers must undertake to pay duty if RGPPL does not acknowledge receipt within three months, provide agreement copies to Central Excise, and pay duty with 13% interest on LNG not supplied. RGPPL must register as a manufacturer for excise purposes, furnish agreements and bills of entry, maintain receipt and consumption accounts, submit quarterly stock and duty statements, undertake to pay duty on LNG not used for generation, and pay such duty by the tenth day of the following quarter with interest.