Please note that according to the latest edition of IATA ticketing handbook (54th edition, eff. 01 June 2022), the Rate Of Exchange (ROE) on the Date of Issuance should be used to convert the cancellation penalties.
Please disseminate this information to your front-liners, sub-agents as well as relevant departments and inform the impacted customers.
You may contact your Account Manager if you have any further queries.