CA Final audit SA query

The info. is right that SA 400 is withdrawn but u hven't seen the other SA's :

The AAS-6 was converted into SA 400 which was further demerged and coupled with AAs 20 into SA 315 and SA 330 which is applicable for NOv.2009.....!!!!!!!!

NOw instead of AAS -6 and AAS -20, u hve the following SA's, viz; 

SA 315-  Identifying and Assessing the Risk of Material Misstatement Through Understanding the Entity and its Environment

SA 330 - The Auditor’s Responses to Assessed Risks ()

Why  is AAS replaced by SA..Please reply soon

TO BE IN CONSONANCE WITH THE STANDARDISED PRACTICES FOLLOWED AROUND THE WORLD BY THE FINANCIAL PROFESSIONALS.........