S.147 : Reassessment – Notice – Non-resident – Permanent-establishment – Tax deduction at source – Survey –Reassessment proceedings was held to be valid by High Court -Subsequent finding of DRP that there was no permanent of assessee in India , AO has dropped reasssement proceedings- Order passed by High Court up holding validity of proceedings was set aside- DTAA–India–Korea. [S.148, Art. 5 ]