In dealing with sensitive information shared by the Welsh Government, HMRC officials will adhere to the standards of behaviour set out in the Civil Service Code.
Wrth ymdrin â gwybodaeth sensitif a rennir gan Lywodraeth Cymru, bydd swyddogion Cyllid a Thollau EF yn cadw at y safonau ymddygiad a nodir yng Nghod y Gwasanaeth Sifil.