S. 147: Reassessment-Non-Resident-Permanent Establishment-Transactions found to be at arm’s length-Supplying materials through direct imports to Indian Railways-Allegation of wholly owned subsidiary-No material to prove conclusively that Indian Subsidiary’s place assessee’s Permanent Establishment falling in any of three Categories-High Court quashed the reassessment-Order of High Court affirmed-SLP of revenue dismissed DTAA-India-USA. [S. 92CA, 133A, 148, Art. 5(1), 5(2), 5(3), 5(4)]