An amendment has been made in section 115JB throught Finance(No.2) Act 2009 which states that provision made for dimunition in value of any asset needs to be written back to arrive at the book profit for the purpose of this section. This amendment has been made with retrospective effect from AY 2001-2002.
In this backdrop, how should the retrospective amendment be given effect ? Whether Total Income for all those AYs to be restated ? If so, by triggering which sections the completed assessments be rectified?