Initiation of anti-subsidy investigations requires industry support, evidence of subsidy and injury, and exporter notification. Initiation of anti subsidy investigations requires a written application by or on behalf of the domestic industry supported by evidence of subsidy, injury where applicable, and any causal link. The designated authority must verify industry support and the adequacy of evidence before initiating an investigation, may initiate suo motu on credible information, must notify the exporting country's government before proceeding, and should avoid publicising the application until initiation is decided; the authority must record in writing any determination on the investigation period.