Assessment of total undisclosed income charges block period undisclosed income at a special tax rate and abates concurrent proceedings. Where a search under section 132 or requisition under section 132A is initiated, the Assessing Officer shall assess the total undisclosed income of the block period under the Chapter; pending assessments for years in the block period abate on initiation, transfer pricing references abate, subsequent searches require completion of earlier search assessments (with a minimum three month rule where applicable), and abated proceedings may revive if a Chapter order is annulled. The total undisclosed income is charged to tax as income of the block period at the prescribed special rate.