Excise exemption for fine bare copper wire granted when proved for use in imitation zari manufacture to qualify for duty relief. An exemption relieves bare copper wire of 0.315 millimetres and finer, as classified in the Central Excise Tariff, from the whole excise duty where it is proved to the satisfaction of the Assistant Collector of Central Excise that the wire is intended for use in the manufacture of imitation 'Zari'.