Reassessment notice limits: CBDT bars issuing section 148 notices for minimal escaped tax within prescribed four and eight year bands. The Central Board of Direct Taxes directs that an Income-tax Officer making a reassessment or recomputation under section 147 shall not issue a notice under section 148 within four years from the end of the relevant assessment year if the tax on escaped income is below a specified lower threshold, and shall not issue such notice after four years but before eight years if the tax on escaped income is below a specified higher threshold; the order defines 'relevant assessment year' by reference to reassessment provisions and states its commencement date.