Excise duty reduction: central notifications amended to lower specified duties and substitute reduced percentage rates and per unit charges. Notification No. 58/2008 directs amendments to multiple prior Central Excise notifications by substituting entries in their tariff tables to reduce excise duties and related specific charges. The changes replace higher ad valorem percentages with lower percentages, convert some rates to nil, and reduce specified per unit and per tonne charges; substituted entries also clarify that goods value is to be determined in accordance with the Central Excise valuation provision.