S. 35 : Scientific research expenditure-Weighted Deduction-Amendment brought by Income-tax (Tenth Amendment) Rules, 2016 with effect from 1-7-2016-new provision brought for certifying amount of expenditure from year to year-prior to amendment in 2016, no such procedure prescribed-Curtailing expenditure and weighted deduction not proper-Entitled to weighted deduction. [S. 35(2AB)]