Exemption from excise duty: government directs non-recovery of duty short-levied on HDPE strips due to prevailing practice. The Central Government, exercising its statutory remission powers under section 11C, directed that the portion of excise duty which would have been payable but for the prevailing practice need not be recovered in respect of high density polyethylene strips and similar synthetic textile material (tariff sub-heading 5406.90) on which duty was short-levied during the specified period.