Customs tariff amendments: revised classifications, duty rates and documentary conditions for specified imported goods, effective date extended. Amendment revises tariff classifications and duty percentages in the notification for specified goods across Chapters 1-98, substitutes or omits numerous Table entries, extends the proviso effective date, and adds new S. Nos. and items. It adjusts Conditions and Annexure requirements-requiring specified certificates for life saving drugs, licensing authority certificates for clinical trials, registration and installation proofs for R&D imports, non transfer periods, and undertakings to repay duty differentials if goods are not used as declared. New and revised Lists expand eligible pharmaceutical, medical, power transmission and textile machinery goods for concessional treatment.