For arm's length pricing of preform silica imports, the...

For arm's length pricing of preform silica imports, the Comparable Uncontrolled Price (CUP) method applies where reliable internal and external uncontrolled-price data exist for the same raw material. Customs data and internal uncontrolled purchases supported that the associated-enterprise purchase price did not exceed uncontrolled prices. In the absence of changes in the transactions, parties or asset base, a consistently accepted CUP method should not be replaced by the Transactional Net Margin Method (TNMM) without justification. Under TNMM, a diversified manufacturer and service provider without reliable segmental revenue or margin data is not functionally comparable to an entity manufacturing only optical fibre. The CUP-based pricing was accepted, and the TNMM-based transfer-pricing adjustment was deleted.