Exemption for glass and glassware: government directs excise duties need not be paid where prior practice saw non-levy. The Government declares that excise duty and special duty on glass and glassware within the factory of production for further manufacture, which were not levied by prevailing practice during the period commencing on 1st March 1984 and ending on 6th May 1984, shall not be required to be paid in respect of those goods.