S. 35: Expenditure on scientific research-Approval by prescribed authority-The deduction as claimed by the assessee under s. 35(2AB) is to be allowed-Prior to the amendment of R. 6, the provision of S 35(3) did not provide for referring to DSIR for determining the amount of expenditure eligible for deduction. [S.35(2AB), 35(3), R.6 (7A)]