Supreme Court of India ([2008] 1 S.C.R. 58), coram Dr. Arijit Pasayat and D.K. Jain, JJ.; judgment delivered by Dr. Arijit Pasayat, J., January 4, 2008. Common judgment disposing of two appeals under the Central Excise Act, 1944 concerning exemption notifications available to cotton fabrics 'processed without the aid of power'. (1) Civil Appeal No. 1856 of 2005 (M/s Vimal Textile Mills): the assessees claimed exemption under Notification Nos. 28/94-CE dated 1.3.1994, 8/96-CE dated 23.7.1996 and 5/99 dated 1.3.1999 despite admitting use of power for ancillary areas such as mixing of chemicals. Held: use of power in the operation of stirrer and electric motor for lifting water and caustic soda amounts to manufacture with the aid of power; exemption rightly denied; the assessee's stand on Section 11A untenable; the Commissioner's letter dated 10.1.1999 suggesting doubt about the nature of the process was 'significant' but the circumstances in which it was written unknown; penalty (earlier equivalent to the extra demand) reduced by the Tribunal to Rs. 25,00,000/-. Appeal dismissed. (2) Civil Appeal No. 5398 of 2002 (M/s Mathania Fabrics): bleaching of cotton fabrics availing exemption under Notification No. 173/77 dated 18.6.1977 as amended by Notification No. 130/82-CE dated 20.4.1982; power found used for lifting water from underground tanks and pouring it into bleaching tanks and kiers; first show cause notice (1986) for 14.12.1980-15.12.1985 set aside in appeal in view of amended Section 11A; fresh notice of 1989 (8.2.1989) issued without mentioning the first notice; CEGAT upheld denial. Held: the stand that no power was used is unsustainable; the five-year period runs backward from the second show cause notice dated 8.2.1989; Commissioner to work out the liability; penalty to equal the tax demand. Appeal partly allowed; no costs. Referred: J.K. Cotton Spg. Wvg. Mills Co. Ltd. v. Sales Tax Officer, Kanpur, 1997 (91) ELT 34 SC; CCE v. Rajasthan State Chemical Works, 1991 (55) ELT 444 SC.