Origin investigation requests enable parties to seek probes into suspect preferential-origin misuse, prompting initiation of domestic proceedings and notice. A Signatory Party may request another Signatory Party to investigate the origin of goods when there are well-founded reasons to suspect preferential tariff treatment misuse. The requesting Party must provide relevant information to the importing Party's authorities within forty five days of the request. Once received, the importing Party may initiate the investigative proceedings under the Rules and must notify the requesting Party of such initiation.