Assessee couldn't challenge notification after availing of exemption for more than 8 years

CST & VAT : U.P. VAT - Where assessee, a manufacturer of two wheeler automobiles, availed exemption from tax under notification dated 19-7-1996 issued under section 4A for more than eight years up to 22-2-2007 and thereafter it filed a writ petition on 23-10-2007 stating that said notification was not in accordance with U.P. Industrial Policy of 1994, said notification could not be said to be not in consonance with industrial policy