Limitation period extended to one year when an assessee withdraws a section 245M application, securing minimum assessment time. References to the Authority for Advance Rulings in clauses (vi) and (vii) of the Explanation to section 153B are amended to include the Board for Advance Rulings, and a proviso effective 1 February 2021 provides that where an assessee withdraws an application under section 245M(1), after excluding the period under section 245M(5) the Assessing Officer's period for assessment or reassessment shall be not less than one year, and if less shall be deemed extended to one year.