Sale tax incentive available under scheme not be deducted from assessable value under excise wef 1-7

Excise & Customs : Where assessee is allowed to retain a part of sales-tax collected by it under a scheme framed by State Government, then, in computing assessable value such retained sales tax is : (a) allowed as deduction under old law prevalent upto 30-6-2000; but (b) is not allowed as deduction under new law effective from 1-7-2000