Extension of notification expiry date under Central Excise Rules, prolonging the operation of the specified exemption period. Amendment substitutes the expiry date in paragraph 2 of Notification No. 185/83-C.E., using the power under sub-rule (1) of rule 8 of the Central Excise Rules, 1944, to extend the temporal operation of the specified miscellaneous exemption by replacing the earlier date with a later date.