Transaction value as primary basis for export goods valuation, with sequential alternative rules and exchange rate determination. Valuation of export goods uses transaction value as the primary basis under the Customs Valuation Rules, 2007; if transaction value is not accepted, valuation proceeds sequentially under alternative rules. Exporters must file an Export Value Declaration; declared values may be verified and rejected following due process, and assessing officers use notified exchange rates to convert between Indian and foreign currencies for valuation.