Tariff classification change: piping and tubing of unhardened vulcanised rubber reclassified under a different excise sub-heading. The Central Government, under sub rule (1) of rule 8 of the Central Excise Rules, 1944, amends Notification No. 192/68-Central Excises by substituting the opening paragraph's cited sub-heading for piping and tubing of unhardened vulcanised rubber with a different sub-heading reference pursuant to Notification No. 349/86-C.E.