Rate fixation under Fourth Schedule updated to a fixed statutory rate, superseding an earlier notification and effective immediately. Central Government fixes with immediate effect seven and a half per cent as the rate under clause (b) of rule 6, Part A of the Fourth Schedule to the Income-tax Act, 1961, by statutory notification; the notification supersedes S. O. 225(E) dated 30th March, 1974 and takes effect from its date of issue.