Investigation transparency requires public notice, disclosure, participation, written oral submissions, and facts available for non-cooperation. The designated authority must publish notice of an investigation into alleged subsidization, identifying the countries, article, subsidy practices, injury basis, submission address, and applicable time limits. Relevant notices and applications must be supplied to exporters, the exporting government, and other interested parties as specified. The authority may require written information within thirty days or an authorised extension, provide participation opportunities to industrial users and consumer organisations, and permit oral submissions only when reproduced in writing. Evidence must be shared among participating parties, while non-cooperation or obstruction may permit findings based on facts available.